I've signed up and done my plays. Hasn't tracked yet
Something no one's mentioned yet is that there's a maximum discount off any one product, so you may have to buy several things to spend your discount. On the plus side though, you often win free plays, and they also add to your discounts. So, when I had spent my £10 deposit and used all my free plays, I had £43 of discount!
Should do. As you may know, I'm very wary of promoting 'arbitrage' opportunities on offers like this, as often it can end in tears if the merchant refuses to pay due to people signing up but then not becoming active users. I made a point of contacting the merchant in advance about this one, and they recognise the danger but are happy for us to promote it at £15 cashback
Worth pointing out that when you use your cc for this it is considered a cash advance for gambling! (Triggering cash advance interest from the date of transaction plus a one off charge - mine is a minimum £3 or 3%)
PS I won, so not as mad about this as I might have been!