I have earned $210 in 5 years from Clixsense. The reason i am still with PTC sites is that I am waiting for big advertisers such as Coca Cola, pepsi, Walmart etc.. to buy advertisements with Clixsense or PTC sites. Ad rates are $20 for 30,000 visitors/month. Usually giant companies go for repeat advertisements and now Clixsense has 7,000,000 members. If there is no development in PTC in next 1 to 2 years, I will leave PTC sites. Money is bugging me.
I had 120 referrals for clixsense. Now I have only one active referral.