PTC is one the ways to earn online and when it comes to how much you earn depends on your referrals either paid referrals or friends and other people you referred.
Try to remember that you can only earn from these sites if you have more referrals.
Usually PTC sites don’t last that long. Most of the sites usually last 6-8 months before they scam and few last more than a year.
So here are the list of trusted PTC sites you can join.