> there's a whale who is just ~rich

The GP said "Demand proof of income or assets", so a 'whale' for whom $3000 a week is pocket change would still be free to squander it. There are already laws which require individual investors in private startups to show $1M in assets but online sports books and casinos are largely free to prey on gambling addicts.

These companies post little notices like "Addicted to Gambling? Click here for help" but then relentlessly optimize dark patterns in their apps to target and trigger addicts. Search and you'll find lots of documented evidence of shockingly abusive tactics.