To be fair, all bookies are like this now with the verification.
The problem as I see it, is if you are "betting" on these game accumulators the odds are frankly rubbish. You get much better value on a straight single where the book is close to 100% and there is lots of bookie competition.
We'll see if I am proved wrong, but I can't see this model working out, I don't think anywhere near enough fans will buy into it. Ladbrokes - another shower seeing as they have limited my account - have a similar offering.