I've never seen Stake or Primedice require documents for large withdraws/wins, have I missed something? I've never played on either site and I'm not familiar with that but this isn't something I would expect them to do.
there is a player in their thread claiming that they hold his 30 bitcoins withdrawal for a couple of weeks now
even after he provided them al lthe neccessary KYC documents
I'm talking about Primedice here,but Stake is run by the same management so I guess it should be same
but the said player has not opened a scam accusation against them,so I would take it with a pinch of salt