I have EXCHANGE button. From what I see, I think it depends on the user, his balance or betting history, what kind of buttons he has. If you make a big bet (it was an almost all-in in my case), I think you might get your Free BTC button back.
If you are in connection with the team, can you please figure out:
For the Free BTC faucet, week starts from Monday to Sunday? Or from the moment you make a claim? While using it, I've got several scenarios. I've claimed about 3k, and in the middle of the week was asked to wait for a next week. Or same scenario, but on Friday or Saturday managed to claim. Or this week - several claims, request to wait for next week, but after some time, I have continued claiming. Either this is a bug, or this message is just a plug to pause frequent claimers