All the loans are in HIVE and paid back in the respective amount of HIVE plus the interest agreed upon before the loan. Hive price compared to BTC or any fiat is irrelevant.
Ownership of the account and all keys are returned upon successful repayment of the loan.
Thnx @klye. U should get this service encoded in hive protocol through DHF funding. So that the return of account is guaranteed after the payment of the obligations. As of now - it is on the whims of the lender. Lender may or may not handover the account back to borrower as it is not enforced by base code.
Oh, the lender has no control over the borrowers account. All of that is handled by the hive.loans service. Powerdowns go to the hive.loans account and are then distributed by percentage of capital of the loan supplied back to the lenders.
It would be cool to see this on a chain level, but it's unlikely this will happen.
Likely couldn't get DHF funcing for this as it's closed source to prevent anyone on steem from taking the code and running a similar service.