$500 /month with adwords is not quite much. But it depends on the keywords you`re bidding on. The promotion on adwords can be blasting but you`ll need to bid on specific keywords and not on the mainstream keywords like "sex" cause they will exhaust your budget within a few hours if not minutes. We worked with about 5k budget a month promoting some webcam sponsors works ok but don`t expect to much.
If you have some more questions about adwords just hit me up on icq and i`ll be happy to help you out
