That is because CoinLearn.org pays 0.0002 btc at most per user per pay cycle from direct earning. If u want to earn more, u need to embed uR referral link across the web...
Didn't know that. Thanks for your info.
One payment is 0.0037 BTC. I'm sure that it is a referral payment. I like this referral earning thing because here U need to spend your time only once and keep earning forever...
Yup, if you have a large number of active referrals, you can get much much larger payment and way less work to do.
But it is not easy to get referrals unless you have an active blog or website.