This is a very unusual way for the KYC procedure.
If I may ask, did this happen before or after your withdrawal? Also, are you sure that this KYC request coming from Rollbit officials?
"Unusual" wouldn't be the first word I'd use to describe what OP is claiming Rollbit required of him, and it would have been nice if he'd provided some evidence that any of this actually happened, because if it is indeed true it's disturbing. And OP, I'm not accusing you of lying; I'm just being skeptical of what I see as an extraordinary claim.
In fact my hope is that OP is lying, that he's working for a competitor of Rollbit and is trying to besmirch their reputation--because if not, then some government somewhere is clamping down on crypto casinos and/or Binance like never before, which is ominous. I don't know out of which country Rollbit operates, but I thought they were relatively safe as far as being in the jurisdiction of the US or one of the Western countries that don't really like crypto.