Multiple Stream Media / Scam and cheating
I signed up for hits4pay.com, where they send you advertisements via email and they pay for each one you click. After several months of receiving the emails, as I was finally starting to approach the minimum amount that they will pay, they wiped out my account. I emailed them about a dozen times and they responded twice saying my account was still active. Soon after, I was completely deleted from their database and they still refuse to answer me.
Don't sign up and certainly don't click their ads. They are collecting money from the advertisers and not paying it to the people seeing the ads.