Paid To Click sites (PTC) are advertsising site where you are paid to view a sponsors website normally for about 30 seconds. Payment can be anything from 1cent per view down to a quarter of a cent. Most if not all ptc sites offer you payments for your refferals clicks too, these can be 100% of their value down to 25%.
So for example you get 1c per click and your refferal gets 0.5c per click if you and your refferal both click the same advertisement you will receive 1.5c payment, this will boost your income considerably over time, so get those downlines built.
The latest PTC site are now offering instant payments so when you reach minimum payout your money is transferred straight away to your chosen payment provider, alot of sites still make you wait normally anywhere between 7 upto 60 days to get your money but you will still be earning while you wait for your money to come through, so normally by the time you have been paid you are ready to cashout again.