After I have mentioned this in my previous feature request, I have done some research on the topic of advertisement in games.
Turned out, Google AdSense is not a great choice for advertising in games, because Google can and will refuse to pay if the clicks are too frequent, it is designed for websites mainly where maybe every hundred visitor clicks, but I have searched and find some alternatives to Google AdSense that designed for advertising in games and hopefully don’t mind if clicks are too frequent.
inner-active.com/
ad4game.com/
intergi.com/
appnext.com/index.html
tictacti.com/
Personally I don’t have any experience with any of them (including Google AdSense), but I think would be a great feature if any reliable advertiser would be integrated into GD as an object for example. If we have an account with the specified advertiser, we could simply drop an ad object in to the game, set position, size, conditions and actions when to show, when to hide ad and of course we could set our own ad link from the specified advertiser.
Thanks. 