Mr. Beast's driving motivation, as he's stated many times in interviews, is to make the best YouTube videos he can. He spends millions on his videos these days, all in an effort to outdo the previous one and provide the best content he can. So while he certainly does give away money in some of his videos, he films it in order to make money while doing it. I don't doubt that he's some level of generous, but his motivations are not solely benevolent.

His first viral "giveaway" video was him giving a homeless person $10,000. That wasn't his money. He got a company to invest in him by giving him the money to donate (while filming it) and promised them a return on their money. It's been a business venture from the outset.

That said, it doesn't really bother me. If he makes $1m dollars giving away $500k, so be it. He reinvests that money back into his business, that employs many, many people and sometime finds its way back to those in need. He's not inherently rich, he needs to make money to donate it and his means of making that money is sometimes exploiting the very act for likes, clicks and ad revenue.

Mr Beast is a game show host. He’s not giving away his own money yet everything is framed as the giant act of generosity on his part. He’s giving away money much like Bob Barker gave away kitchen sets.

Yeah to me he seems genuinely generous. Obviously there is a part of it being done to attract more viewers (Otherwise he could simply not upload the video at all) but from my, granted limited, experience of his videos a lot of the money he makes goes in to making (I.e. donating more) new videos. Very different from getting millions of TikTok views for the price of a flower bouquet.