The casino sign-up offer of Grosvenor  is bet £20 and get £30. That is split as up to £20 to match your deposit and then £10 on a specific game  As with most offers when it comes to signing up with a casino, there are some wagering requirements which, in this case, require bettors to play through their winnings 5 X before they are able to withdraw it. That makes things a little more difficult but most bookmakers have play through amounts on a casino offer. So, when it comes to how it compares with other bookmakers, it would be similar. It is not a superb offer but at the same time, it is also not the worst one out there and is worth looking at if you are not a sportsbook fan.