So if they cant able to have that level 2 verification by 31 of this month then the only option they could have is to make out some withdrawal of their funds inside of their casino account.
It would really be that up to them whether they would be finding another place to play or bet on but to know that Stakes reputation on which it wont really be giving out some doubts for
someone to make out some verification basing up on the credibility and popularity of the said site. So it will really be up to your choice.
I feel that they might extend that particular date soon since some gamblers might not be aware of these new rules and could miss the deadline. They will definitely lose some players though since many gamblers detest KYC with a passion.
However, the loss will probably not affect them in a big way thanks to their overwhelming popularity in the crypto space.
I doubt they will extend it. There must be a reason for choosing this date, maybe it has something to fo with the license or whatever. What they will do (I guess) is leaving the option open to verify on a later point to regain access to everything stake offers, that would make sense.
But of course we can only wait and see what some players that are actually affected by this will share once the new year has come. Until then everything is just an assumption I guess.