I did a BTC refund at Minersource for an X-1. They paid me back in full BTC minus a reasonable transaction fee.
The difference between what I paid in BTC and what I received in BTC was 0.0009. I didn't look too much into the conversion rates because I try to not think about conversion rates when buying/selling miners since it just confuses the only thing that ever should matter: BTC profit. It is quite likely they made some fiat on conversion, but I really don't care. They took a risk doing that and could have lost or won. I'm not a fan of bobsag3 by any measure, but Minersource was completely fair as far as I'm concerned.