Definitions

PTR = "Paid To Read" means Get paid when you read something in short period of time.
PTC = "Paid To Click" means Click-wait-get paid-close, usually apply to banner
PTP = "Paid To Promote" means Do whatever to let people open thet webpage and you will

earn point, then convert it to cash
PTSU = "Paid To Sign Up" means Sign up that program and get paid in larger amount than

other "Paid To...."
Paid to search = seach and earn money (usually specify country)
referal = refer that program to other people
banner = the picture for advertising
hit exchange = exchange webpages to others
point = for redemption or converting to cash
contest = the websites' activity that have rewards
Forex = "Foreign Exchange" = International currency trading