1. The hot wallet balance varies but generally large enough to cover high rollers
2. .05% I believe
3. 1% of the bankroll
I'm confused. AFAIK, the max win was equal to the house edge of the app he was betting at, in terms of percentage, with a cap of 20 BTC. (1% edge = 1% of bankroll). Is this still the case, or was the change made without an announcement? Also, a bit over a month ago, you accepted 0.01% edge bets, and I don't think an announcement was made about the change.
Is it possible to have a more precise answer regarding the hot wallet?
It's better to keep it hidden so hackers have to guess to whether it's worth it for not rather than knowing.
The max win is relative to the house edge in a sense, but the win amount is still capped at 1% of the bankroll.