AdCash Review
At first look, the AdCash website seems to offer a lot of goodies and makes high promises like $2 per referral, $0.5 per click etc. But none of these seem to apply once you register. I found a single 1-cent 120 second ad and a few 0.002$ ads. The website also contradicts itself about the payment details and there is a lot of confusion about how much you are actually paid for clicks and referrals. You also receive a lot of spam mail from the site. Avoid this one.
Updated 6 Mar, 2009:
This site is a scam.