Given the fact there's a HUGE cue in the FH exchange for everything but BTC, this faucet has decided to convert everything they had to other coins, that's why BTC is empty in the faucet.

If you want BTC, convert your BTC claims to something else, like BTX or LTC, then withdraw, then place at FH a sell order and get it converted back to BTC.
Both exchanges charge no fees in this case, meaning at the most you lose a tiny amount due to rounding.