Paid to Invite is a new system which can generate you alot of income in short time, without much effort. First of all you have to understand how this system works. User earn commission for every referral who joins and select a membership (which are bought by PayPal subscriptions), but in the same time, to be able to use the system he have to choose a memberhip first. Cool part is that membership is valid for 30 days only, after 30 days is automatically renewed by PayPal, user get commission again, in the same time, again you have your cut from sale.