"cannot withdraw less than £30 from their accounts with it and that they must have "wagered" that amount before those winnings could be withdrawn"
Thats more than misleading!
That means you must lose a further £20 before you can withdraw £30.
no, wait, that means you must *win* £30 before you get any money - and how much would that cost?
no, wait, if you win £30 with the free tenner you cant have it ,
so you must *bet* £30 and then you can have it, if you've got £30 in winnings?
does that apply to all withdrawals or just the first?
Thats like the lottery saying "No , you cant have the 3 mill because you havent spent 3 mill with us so far"