This comment is pretty reactionary and maybe doesn't deserve a reply but I've seen variations on this criticism before and as someone that's worked in this space it doesn't make any sense:
> There is also widespread "thrift hauls" on Depop where 20 something rich people ransack thrift stores which are staples in low-income communities
This complaint seems to be based on a profound delusion, which is that the social mission of thrift stores is to provide cheap clothing for people who don't have much money.
The charity aspect of thrift stores, at least historically, has been the money that you give them when you buy stuff there.
So in fact the whole point of the enterprise is to have people who have stuff they don't need donate it to a worthy cause, who sell it to people with money who want it, and then they take the money that they make this way and give it to people who need money or use it to provide needed services etc.
Nobody is "ransacking" a charity by doing the exact thing the charity is hoping people will do, which is giving the charity money that can be used to further charitable activities.