As mentioned in Making Money From Flash Games with Affiliate Programs, Competitions, In Game Advertising and Micro-Transactions, there are many methods from which you can earn from a Flash game you have made.
Here, then, are ways to earn by porting, revenue sharing websites, self-sponsorship, sitelocks and sponsorship. Again, this is not necessarily an inclusive list.
Don't consider yourself limited to either the companies or methods discussed in these two articles. If you find a method of profiting not listed here, and it works, by all means use it.
Porting to Other Platforms
Taking a Flash game and porting it to another platform is popular, especially with the increase in mobile gaming. Although some of the platforms will currently run Flash games as is (this may change with mobile gaming in particular thanks to Adobe's abandonment of the mobile player), native apps and executables allow some flexibility that a normal Flash game will not.
Money can be made from selling the app or executable itself, in app ads or in app transactions.
If you have a Flash version, you would usually promote the native app or executable from the Flash game itself.
The biggest app stores are:
BlackBerry App World
For all iStuff, such as iPad, iPhone and iPod, it is now easier to export apps for these platforms, using software like Flash CS5.5.
Apple provide the means to sell your apps, join the iAd advertising network and will also provide the means to enable in-app purchases.
PC and Mac games based on the Flash game can also be sold. Such games will usually be bigger and better versions of the Flash game itself.
You can sell the game yourself, or through a third party, such as Fizzy, BigFishGames or GameHouse. Third party sales will usually require a commission or fee to be paid.
Adobe's AIR platform is useful for creating executables from a Flash game.
Revenue Sharing Websites
A number of sites will share advertising revenue. These may require the addition of their own APIs (or increase the share percentage if you do) or the removal or blocking other ad networks and external logins and micro-transactions.
FizzyFizzy provide a revenue share to games uploaded to their site. Implementing the Fizzy API will significantly increase the share. Fizzy make most of their money from selling their own games, so expect to see a lot of links to them.
Fizzy also provide a service for distributing games that people have to pay to play.
Fizzy do not restrict the use of other ad networks or APIs.
KongregateKongregate will share a minimum of 25% of the advertising revenue with you. An additional 10% can be earned from implementing their API, and a further 15% if your game is exclusive to Kongregate. This last 15% bonus will only be given for as long as you game is exclusive; one it is uploaded elsewhere, you must uncheck the exclusive box. Games sponsored by Kongregate will still be eligible for this bonus even if the game is published to other sites.
Kongregate do not allow games with in-game ad networks, third party login systems. Micro-transactions, which require a third party login, are therefore not allowed, unless you are approved to use Kongregate's own Kreds MT system.
Kongregate can provide a significant income, especially if your game integrates their API and does well enough that badges are added. Games that aren't particularly popular and don't score highly enough are unlikely to get more than a few hundred plays.
MindJoltMindJolt require the integration of their own advertising and scores API. Games are mostly played on their Facebook app, although this is not as popular as it used to be.
MindJolt do not allow other ad systems, logins or micro-transactions - although they provide their own MT system. They have been known to request removal of more games links and sometimes sponsor branding.
Although not as popular or as profitable as it used to be, MindJolt will usually generate several hundred dollars of income from a game whilst it is on their front page, although this can vary. Long term income is typically low, unless your game is popular enough that it gets added to the popular games section on the front page; itself hard to do, as games already there have an advantage in remaining popular.
NewgroundsNewgrounds provide a small revenue share from games uploaded. Unless your game is unusually popular on the site, there is little long term earning potential. Newgrounds is used by many portal owners to select highly rated games for their own sites, so can help the distribution of a game.
Self-sponsorship is where you have your own game portal and drive traffic from the games there. Ninja Kiwi's Bloons game is a notable example of where this method has proved very effective. Most developers will be unable to generate as much money from this as they would get from a sponsorship, as they often lack the ability to monetise the incoming traffic as well as big portals. If you cannot, or are unwilling to, sell a sponsorship, it does make sense to self-sponsor, even if the site only hosts your own games.
A sitelock is where you sell a copy of your game locked so that it can only be played on one site. This will usually require customising the game, such as by adding in-game branding for that portal, removal of other branding such as sponsor or developer, adding a site's API and removing other APIs.
If your game is sponsored, the sponsor may require that no sitelocks be sold.
BigFishGamesBigFishGames are willing to buy sitelocks for a fixed price. These games are distributed using iframes though, and as such are not considered as sitelocks by most sponsors, who will not permit such a sale.
FlashGameLicenseFlashGameLicense is the largest collection of games up for sale for sitelocks, although there is no guarantee that you will sell even one.
MindjoltMindJolt are now offering as an alternative to their ads API an up-front fixed payment for a game.
You are not limited to the above methods for selling a sitelock. Some developers have had success selling games through sites such as DigitalPoint or Talkarcades.
SponsorshipFGLopedia describes all types of sponsorships in detail.
FlashGameLicense (FGL) is the largest site for selling sponsorships, but merely completing a game and uploading it does not guarantee a sponsorship. Sponsorships are hard to get, and games have to be considered good enough for a sponsor to even consider buying them.
BuySellArcades, although it is less popular than FGL.
Other methods of gaining sponsors are of course possible, such as contacting them directly, although most bigger sponsors will usually have an FGL account.
Some smaller game portals may be unwilling or unable to put up the required deposit to buy anything from FGL other than through the Game Shop.