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.