Most developers who put a lot of work in their games are not easy sharing their sourcecode, wich is understandable. But what i do is mail them and give in a textfile-attach the code, with the question if he will add this in the swf and share it, so hundreds of forums will show his game....with copyright from the author. Now, i've had a respons on a awesome blackjackgame and if i get back the swf i will share it.