The good part is that Tonstation has the free spins (
https://bitcointalk.org/index.php?topic=5553110.msg65716557#msg65716557) promo for Bitcointalk users. I've exhausted mine, so I am not sure if the codes are still active. Just try them to get more acquainted with TonStation for free. It might convince you. I got good profits from mine experience actually.
I think it is three per person because I have also exhausted mine too without getting any balance despite claiming the reward after the spin. I don't know if someone else didn't get anything or it is just peculiar to my own experience. I tried using it again but it showed they have been used. So it is just those three for a user for now with what I experienced.
Maybe you are not lucky enough mate because I still have some balance on my profile. You need to try your luck next time so that you can be quite fortunate. Did you only spin once or you spin more than once which I know would have earned you some points that will be enough while you keep accumulating.
Their website can be somehow confusing if you have not participated in any Telegram airdrop in the past. If you have done many airdrops, dancing around the TonStation telegram app would be quite comprehensive to you and you will be able to earn more points by participating in tasks.