Ok, thanks for the replies. I never saw it before to be fair but apparently it happens more often. I deposited €250 and tried to cash it out, but it got cancelled. Upon informing what the reason for cancellation was they referred me to a line in their T&C.
I registered on a casino but found out they didnt block their restricted slots when playing bonus money and they had quite a huge list. Because I didnt feel like checking every time I entered a slot if it was restricted or not I decided to cancel bonus since I was affraid making 1 mistake would give them a reason to forfeit any winnings.
However my withdrawal got cancelled because apparantly somewhere in their T&C they state that every deposit has a 1x wager attached to it. I never had this before on any casino. Is this shady business or is this normal?