1) same message for address change appearing on my mobile app and on the browser
2) reward points updated correctly in their database; just prior to depositing, the lost bets caused an adequate increase in the reward points status, and this amount is still there. I used the same page to deposit. I'm no expert, but I would suppose if it was a phishing site, then the whole webpage would need to be a scam, not just the part which was related to the new address notification and the QR code.
3) they corrected the link for generating new bitcoin address after we brought it to attention, now this "new deposit address" button is working properly
It would be too big of a conspiracy theory all 3 above to be true.
There are several ways to just compromise part of a website. It could’ve been a sophisticated man-in-the-middle attack or a malicious extension injecting the notification in your browser. There are even some websites that look exactly like FreeBitco.in and have nearly identical functionality. I don’t know the likelihood of these scenarios, but it would really clear things up if they responded directly to your concerns.
I'm not so sure about that. I also tried tracing the blockchain transactions from the addresses mentioned, but couldn't find any evidence that they are related to known FreeBitcoin wallets. Can you point me to the evidence why you think these addresses are "with them"?
Comparing these user’s FreeBitco.in deposits with my own, my most recent deposit was consolidated along with several other deposits 24 hours ago. I also have another recent deposit that was consolidated into their hot wallet. None of these transfers follow the same consolidation pattern as these affected users, whose deposits were first swept into a Bech32 address and then consolidated. If the purpose for changing addresses to a new format is to save fees, it doesn’t make sense to add an extra step in between depositing and consolidation.