> the reason I heard is "our boss don't want to run such a business" which sounds absurd

Liang gave up the No.1 Chinese hedge fund position to create AGI, he has very good chance to short the entire US share market and pocket some stupid amount of $ when R2 is released, he has pretty much unlimited support from local and central Chinese government. Trying to make some pennies from hosting models is not going to sustain what he enjoys now.