Two reasons I find this distasteful. It might be a net good still, I’m not sure. It’s not obvious however.
One downside is that it competes for the same “feel-good” feeling which much more effective charities compete for. Someone engages with Mr.Beast, feels like they did good. Later they walk by a food shelter in need of volunteers and thinks “I already did my part.” As we have parasocial relationships, we have paraphilanthropy. I suspect it ultimately makes people less compassionate and caring. This is hinted at here:
> For Miller, what makes Donaldson remarkable is that he essentially asks his audience to see themselves as a commodity, and to therefore see their views and likes and shares as a force for good: “MrBeast is actually telling people that they’re entering a marketplace, by saying, ‘If you watch this, this is worth so much money, I can raise this much money and I can spend it on good causes.’” As Donaldson says in one video for his philanthropic sub-channel: “Beast Philanthropy is literally funded by your eyeballs. Not even joking.”
Truth is, watching hours of YouTube isn't doing good. At best it’s entertainment, at worst it’s hours of human potential wasted.
The other downside is that it normalizes the extrinsic reward to doing good. Kindness done for the “thank you” breeds resentment. The vulnerable can be thankful, but they can also be angry, frustrated, confused, hurt, mentally ill, etc. Sustainable kindness is done for oneself.