I am a member of some, who I have no doubt will pay me as soon as I reach payout, such as Inbox Dollars, Send Earnings, Wordlinx. I have reached payout at Hits4Pay and I will get paid after the first of the month. I have just upgraded in Wordlinx and instantly got about 25 more ads. I also got some free advertising. You can upgrade for $5 now, but in about 20 days it will be going up to $10 a year, so better hurry if you want to get in on the upgrade.
Some sites that have paid me have went down or had problems, such as Moratraffic. Daily clicks, I requested payout long ago and they have returned everyones money back into their account. Why? Who knows, this site has a history of problems. Apairof has no emails right now, but I was paid many times there.
If you want to try out some sites that really do pay, they are listed at the end of this post, The one at the very bottom is Hits4Pay.
I want to update that Hits4Pay has paid me with paypal! I waited less than a month, I think it was about 2 weeks.
Another site I have been paid by is Matrixmails, they have a $2 payout by paypal. They also have paid offers which are paid separate from the click earnings. There is no minimum payout for the offers and no long waiting period for your money! I have been paid for clicking and also for offers.