I was a stake Member and never was a rollbit member but randomly got a 500$ welcome bonus in my stake only email, meaning Stakes email database was compromised or sold that's for sure.
Burner account meaning I just wanted to place a bet, win withdraw lose just scrap the account, KYC wasn't a thing and I preferred to stay anonymous.
I have the original keys and wallet the funds were sent from, the location and browser used, basically everything. They even could have provided me with an email or username hint kinda like j***
22@gmail.com and I could have remembered the rest, and I even provided them the password currently set.
Well first of all it's not a scam. It's called privacy policy. Sure they COULD give you a hint but that's already against their rules and probably against their license as well.
I am also not a fan of stake, far from that, but this one is actually on you.
Also, when you got the rollbit mail that means you have had a stake account before, which is also against their rules. How else would you have gotten the rollbit mail with the 500$ bonus?
I myself also got that rollbit email and a 100$ bonus. I was platinum 2 or 3 at the time. Rollbit bought the email/VIP data of stake players that were stolen in a hack around 2 years or so ago.
Anyway, since you breached their TOS by opening a second account ( or more ) there is nothing to complain about anyway.