I searched it about double spend, but it is absolutely a bullshit because sportsbet.io credit your deposit into your account after blockchain confirmation.
Nope, Sportsbet.io is one of the casino here that offers instant credit on deposit. I played and deposited multiple times in the casino which they credit my deposit even if it’s still on pending.
I’m not updated whether they already change this feature but since your violation involves multiple account which only means you are associated with an account that committed double spent before which I can confirm that they have this feature in the past.
I doubt they will accuse you without basis since they are known for being generous here.
Word, I also always got my btc deposit instantly and I could also use it right away, even if there wan't 1 confirmation yet. Any other currency I guess is the same but since these or mostly MUCH faster I didn't recognize it.
I guess some account connected to you (for whatever reason) did something like double spending the deposit and because of that your account got flagged. As CT said it might be because of same IP or other reasons. Since Steve always looks into any problem here I guess we will find out more soon enough.
One thing you can be sure of though, sp.io is NOT a scam and with stake they are the biggest players around. They won't "scam" for 1000$ or in general, trust me with that!