sooooo
it's scam or not? lol
They are selective scammers in my opinion and as far as I have understood because they will let players play and suddenly they will scam a few users and maybe even rigging their rolls (I am not 100% sure of the rolls being rigged but I guess they might very well do that).
I think some of the people not getting paid probably tried to do double spend attacks and 999dice preys on these people since they were trying to take advantage. Shady on both sides to be honest, but like I said 999dice has been good to me.
The amount of complaints and their inability to prove the the bank when asked shows something is wrong and I believe they are selective scammers and hence they are running so long because they don't scam everyone but selected people.
If double-spend is the only problem then they can easily credit deposits after 1 confirmation and solve all the problems, right?