Contests2Win.com or c2w.com (for short) is one of the best contesting sites that I have come across.
I am a regular at it and have won a few teeny-meeny things over the years.. some useful, some not-so-useful stuff. Ah well, all part of the game, I guess!
I play it more like a relaxation at the end of the day, so it is good fun. As well as get some knowledge.
Additionally, if one has been following the site, it is used as one part of the media-mix by various products and services when they are launched into the market, or just to reinforce a brand. So it is also a good place to get some good brand knowledge. Ad agencies recommend this to their clientele often!
Smart, innovative and (relatively) inexpensive for them!!
I guess one could call it a win-win situation as people across the entire country get to know about products / services in the most fun way, and also try their luck to win something in the bargain :)
All in all, a win-win situation.
Though one MAJOR complaint is that when people spend time to collect so many points on the site, the least they could do is offer better prizes as redemption for the points.
Wish they would do something about that. In the meanwhile, keep contesting and enjoy the site.