Customer support said:
Hi yes we sent out an existing customer coupon code for $150 to all customers. You can find this in the email you used to place previous orders.
FutureBit Team
hello@futurebit.ioI have not received mine at all. Despite purchasing Apollo 3x Apollo LTC, 7x Apollo BTC total.

Awaiting reply from support on e-mail since 13th December.

Got mine, though it was tagged as spam.
Maybe check your spam folder.
HTH