Spot a scam site

Here some way to spot a scam site.

1.Adverting Cost vs Member Earning: After joining a PTC site click Adverting  button. If you see adverting cost is too low than member earning, the site definitely a scam site.
Here an example if a site promised to give their member $0.01 for direct click &; $0.005 for referral click then their adverting fee should around (1000*.01*0.005)=$15.
2. High Pay: If a site offer  more than 0.02 cents per click to their member it's a scam site. No advertiser pay such amount.
3. Free:  Joining PTC programs should be free. If it requires a fee to join it’s definitely a scam.
4.Minimum Payout: See what is their minimum payout. An ideal minimum payout is less than $10.
5.Forum: Generally scam sites avoid forum or any support contract info. A legit site is always eager to answer your question where scam sites are opposite. Visit a suspicious sites forum. Post a comment & see if they verify it. A legit PTC generally don't verify comments. Visit their payment proof & problem/bug section.
6.Internal Invest: See what is their payment method for buying their service (upgrade membership, rent referrals, buy advertisement). A scam site don't allow you to buy any of this service with your internal fund.