My comment is that nitrogen does have on hold events, but it doesn't stay like that till the start of the game. Sometimes though it takes a while before it gets released. But it does eventually open up. Not sure why you placed 1xbit there. But that site has plenty of scam accusations, maybe you should reconsider.
In nitrogensports you are right, the hold game gets released before the events start. But in this case, We may lose the best betting opportunity, lose the best odds. So this is where I want them to improve.
About 1xbit, I am contradictory. I know they have a relationship with 1xbet, and 1xbet was in blacklist in SBR. I agree to 1xbet is untrusted bookie.
But from another perspective, 1xbit and 1xbet may be different management team, in bitcointalk.org we didnt find the problem that was not solved about 1xbit.
My exprience in 1xbit was good, so I recommand it.
Of course, if can prove 1xbit was untrusted I will put them toblacklist.
I will add your review to #1, let the players judge their own.
Thanks for the share.