BTCClicks - Best earner with or without an upgrade. If you upgrade you get paid more per ad, and you get more from your referral's clicks. Referral are available to rent at the same time daily. A great thing about advertising on this site is that your ad is put into an archived list. This is excellent if you need a backlink for your own personal website.
CoinAd - Great earner with a low cash out of 0.000544 BTC. This is a quality bitcoin PTC site, and is highly recommended. There have been more ads lately as well.
BitToClick - Excellent bitcoin paid to click. You can also earn from their offerwalls. This is a great earner, with many ads to click. It is fairly new site, it's a good time to get referrals.
VisitBit - Surf through websites to earn bitcoin for each page visited. Payments are automatically sent to your microwallet. The same wallet that many of the faucets use.
BitPTC - Visit a website for 10 seconds, and earn instant bitcoin payments to your microwallet. The same wallet many of the faucets use. Many sites to view daily.
