I have recently started folding but there's two things I don't understand.

First, how does the FoldingCoin team know who has signed up with Username_FLDC_1BitcoinAddress? Is this information public? If so, where?

Second, if the folder provides a Bitcoin address (the one from their Counterparty wallet), how are they paid in FLDC since the folder provides a BTC address not a FLDC address? I can see that they could be paid in BTC but not in FLDC. How is FLDC assigned to the folder?

Thanks!