If you want to earn fast money and you don't care about your reputation, then you should go for PTC sites. PTC can easily finding advertiser, well most is link with other PTC sites, and member is easily attracted to join in if you manage to pay well in the first few round. In this case, many members will upgrade and you can earn a lot from that, then depends you want to continues the ptc site or not, or just scam their money and leave with another new PTC to continues this business.