Renting referrals on legit ptc sites will increase my earning?

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Friends,i am on lots of legit ptc sites like neobux,onbux,cashium.net,paidtoclick.in,ifbux,ahbux etc.i reached the maximum cashout and i would like to invest into these sites by renting referrals.Finding referrals are very hard.Renting referrals will work for me? I heard that they are just bots.Is it a game of Luck? Let me know about your experience.