cash4visits.comは安全ですか？

First of all, I have not signed up with the website because i'm not that dumb, but i decided to look at how it "works" They claim to give you $0.50 for every person who clicks on a link they provide. However, you cannot get any of that money until you have $30 in your account. They also "will not be liable for delays or failure in performance" as well as more importantly "reserves the right to restrict, alter, or modify fees, benefits, rules, regulations, special offers, membership terms and conditions or terminate services any time and without notice." So in short, obviously it's a scam, and they can change the amount of money they say you will get whenever they want, probably to below $30 so you can't cash in.