have u ever make a referral exchange with someone and he/she eventually cheat?

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if u are a clicker u must be a member of a forum to get some information of ptc site or maybe make some offer of referrals exchange.i do that,to get some referrals i usually make a referrals exchange.but u know,it's hard to find active referrals.in the first,when we make a deal,we promise that we'll be active each other.but u know what?some of them are not active!they're cheater.they clicked the ads only once after registered,after that,they're gone.it's happening to me, i'm tired to send a message to warn them,but it's happen over and over again.at the ends,i stop clicking they site.is this situation ever happen to you guys?share with me..