i play zuma for money on mypoints.com
i earn 5 points on mypoints for every $1 i spend and tournaments are only $1 to enter. I usually win a whole lot more than I lose. I made an initial deposit of $10 and have earned 400 points (ie "spent" $80)
if anyone wants a mypoints reference, PM me. it's your basic earn points to redeem for gift cards site, but I really like it. They're not super pushy.
this isn't meant to be a spam post. playing zuma for money rules considering i used to spend hours playing it on yahoo games and not earning anything for it haha