When youtube used to let me report malicious ads, it used to tell me those ads and channels were based out of India... and youtube has had a long-standing issue of not vetting their ads for scams. If it's not MrBeast, it's the "how to get a free Coke mini-fridge" (or Louis Vuitton handbags, or Milwaukee tools).
He also paid an advertisement (still running on youtube I assuming, seen it within the last week)
"Anyone who visits this page get $1200" or something in that range..
Are you sure that it was him promoting it? Scams like "Send $$$ to Musk/Bezos/MrBeast and get 2x $$$ back" are extremely common but they're just that, scams by random unaffiliated scammers.