
Since 2007 (one of the oldest PTC sites)
Earn by: PTC, ClixGrid Game, Tasks, Surveys, Offers, Referrals
Pays up to: $0.02 per ad, $5.00 per ClixGrid win, $1.00 per survey, average of $2.00 (but up to $50.00) per offer
Minimum payout: $8.00

Since 2009
Earn by: Clicking, autosurfing, completing offers, signups, liking Facebook pages, watching videos, promoting your referral link, CNH Lottery Game
Pays up to: $0.01 per ad, $0.02 per like, $0.10 per day for Autosurf, $10.00 per signup/offer
Minimum payout, $0.60

Since 2003
Earn by: Clicking ads and sharing links
Up to: $0.005 per ad
Minimum payout $10.00

Since 2008
Earn by: Clicking ads, signing up, reading ads, promoting, referrals
Pays up to: $0.01 per ad
Minimum payout $0.01

Since 2012 (however, it's owned by the same person as PaidToClick.in)
Exact clone of PaidToClick.in except with different ads (therefore, sign up to both to double your revenue)

Since 2008
Earn by: Clicking ads, tasks, offers, surveys, videos
Pays up to: $0.015 per ad
Minimum payout $2.00