Does this site still pay?
I'm Newbie (in Bitcoins and Pyramining) but as I've seen in the F.A.Q. rewards are send in multiples of 1 BTC. If your account is near to be fully rewarded (less than 2 BTC left) reward will be sent upon completion in a single transaction.
I believe that means you need to reach that reward (1 BTC) or your deposit plus your bonus percentage (100%completion). That is why it is necessary to find people intrested in investing in this type of mining, since they cannot enter Pyramining without a referral link. If they use your link, your reward grows and you not only get better return but also in less time.
Though Pyramining sais they borrow hashing power, it looks to me as an outsoursing of it. They are the experts and know about the necessary technology, I deposit a certain amount that borrows what is called the "Equivalent hashing power" This value may vary depending on deposits of other members or infraestructure modifications.
If I am wrong I should appreciate if you let me know.