Have any of the celebrities who encouraged people to loot offered up their own homes, studios, vacation properties, etc. for that or is it only the poor, the disadvantaged whose small businesses are supposed to be sacrificed for retweets?

Public housing projects, apartments in poor parts of town have been burned to the ground. How many mansions in Hollywood, how many condos in Manhattan?

"For example, controlling for region and city characteristics, median family income declined significantly after 1960 in the cities that had severe riots"

https://www.jstor.org/stable/25067405?seq=1

Anyone aware of study where richest, safest, most well-off people have ever sacrificed in a riot?

It's easy to support the destruction of other people's communities, less easy your own