https://relayx.medium.com/rex1-bitcoin-backed-loyalty-rewar…

https://relayx.medium.com/rex1-bitcoin-backed-loyalty-reward-for-relayx-users-3cf56cc0a499

Block 677904 was the start.

REX1 will last 20160 blocks (so until block 698064).

Then you have until block 708144 to redeem.

Redeem function not available yet.