PTCs are scams. you never earn from them... Or at least get proper compensation for your efforts.. The only way to earng enough from them is gain hundreds or thousands of referrals, who by the way are working their ass off thinking they will earn, when in fact they earn only 5-10 dollars, which they dont get payed of since it's below payment threshold.
Who earns then?
The referrer! The referrer earns 5-10% of their referrals earnings. So if you have 100 referrals earning 10$ each you get 100$ and 900$ goes to the PTC site! The referrer and to 100 referrals lost the game and the PTC site WOn!. Now is that a complete RIP OFF, or what?