GPTBank pays you money back for ptcs????

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I have heard about gptbank long time ago but I always thought it was just a site that lists ptcs that are scams. Today I wanted to check if a site was scam and I found out that they pay you money back if you join certain ptcs as their referral. I read that they pay you once you reach $2 via alertpay. Are you a member of gptbank and what is your experience with them? What is the percentage of the money they earn from you as a referral do they give back?