--Pay to Click--

YouData is one PtC I highly recommend. You won't get rich using it, but it pays out weekly via paypal, no matter how low your balance is. 1 cent? No problem. The concept is that the advertisers are paying to advertise directly to you, and you reap the benefits, rather than just being forced to watch ads whether you like it or not.  The ads are small, unobtrusive, and you can choose to either view them on youdata's site or download their "Adget" to view it on your desktop whenever you like.  You don't purchase or click endless streams of ads; an ad for a site will pop up, you click it, decide whether or not to visit the site (for more money), and that's it.  You can leave right that instant if you so choose, the payment has been issued. This program does allow for referrals, and they're very close to adding video ads which will be worth a lot more money.  I've been with this program since early June and have received a payout every week.  It's a nice little bonus on the other payouts I have via Paypal, and they do add up.

Trek Pay is similar to YouData, though the ads are less focused on your specific interests and wants.  Rather than paying based on how many ads you've clicked, the amount of sites you view set your rank on the site, and then you are entitled to the revenue based on your rank.  There's a lot more sites here to visit than with YouData, and they refresh after 24 hours, so you can click them again.  They also pay out via paypal, and I have received 2 payments so far.  The minimum cashout is $5.50. Again, you won't get rich from this, but it's a nice bonus, and only takes about 5 minutes out of your day.