BestCashBux PTC scam or not?

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I register at bestcashbux ptc site and i've been clicking for quite long now. I heard rumors that this site is a scam. What can you say about that? I need someone to tell me about this site. Do i have to stop clicking at this site? Because they say bestcashbux don't pay anymore. Is it just a rumor or for real? Because i'm thinking if i'm going to invest or not...