hello,
i don't think you can link with faucethub, i was in same situation, i give up my accounts with wallet address and i did new with email.
unfortunately i lost current earnings (no weekly payments) loyalty bonus
and the worst the few active referrals i had on these moonfaucets... (only 8 on moonlitecoin, 5 on moondogecoin and 2 on moonbitcoin) a real loss :x
it could be even worse if i had more active referrals, i can just wish i will have new...
(we have explained all this here :
https://bitcointalk.org/index.php?topic=3622000.msg37186182#msg37186182)
but i think you were there too