what are the best ptc sites?

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I have recently started looking into the pay-to-click type websites, and I guess if you have several on the go, with relatively low minimum payouts, you could do quite well from them. I have signed up with Wordlinx and Clixncash, but does anybody know (and if possible, tell me how good they are!) of any other Paypal paying PTC websites that have a) a good amount of money per click and b) a good number of links coming up each day.