There are some terms and abbreviations used in my website. They may be unclear for some newbie so here are the explanations:

PTR - paid to read - you get paid for reading mails

PTC - paid to click - get paid for clicking on banners and links at the website

PTP - paid to promote - get paid for promoting the website. Get money when someone clicks on the link you have placed.

Autosurf - a program that automatically leads you through different website (you don't have to do anything)

Referral - a person that has signed up under you (referring to you). You get some percentage of your referrals income, but the referral DON'T lose anything. If someone signs up without referring to anyone he will be referred to someone automatically anyway.