First time I've got burned with "Welcome offer".
Clause 10 - The maximum bet allowed while the Welcome Bonus is in play is EUR 5. Should You bet higher than this while the Welcome bonus is in play, the Casino reserves the right to confiscate all winnings.
5.1 states that "A player's total account balance consists of a cash account balance (‘Cash Balance’) and a bonus account balance (‘Bonus Balance’). All sums which you deposit into your account shall be placed in your Cash Balance. Sums which you receive under a bonus for performing particular tasks are paid into your Bonus Balance.
I feel clause 10 is intentionally vague and can be interpreted several ways, or at least I did. Didn't dip into bonus funds, using only my Cash balance. Any way restricting cash bets is shady af and shouldn't be used on any respectable casino.