Quick drop from 100% provably fair games to ~1%. Gotta be said.
Yes this is the main disadvantage for Stake of adding those games from 3rd party providers.
But on the other side, it gives them more players because there are many gamblers who love to play those games from 3rd party providers.
Yep, they're coming. AFAIK they're currently in beta and you can get early access if you have a high enough VIP level and request it.
I do not need to access the beta as it is open for public already
I'm not really sure if Platinum II is a high enough rank to get early access for something like this.
But I have once got early access for the sportsbook some time ago.