Looking for all legitimate PTC's that allow you to rent referrals!

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I'm looking for all PTC's that allow you to rent referrals with your PTC earnings balance, that pay by Paypal(at least.) I would prefer also to see a payment proof of the given website. I'm aware of quite a few places already but who knows. You may tell me one I didn't know existed in which case you got yourself a potential referral. Thanks to those who help.