.............Thrift stores may be "done."

The opposite is true here. Donations are way up, Thrift stores are overstocked and they are opening new locations to handle the increased volume of goods.

Supply and demand followed by distribution strategy.

Every place has a different experience.
This is true in our Area also.. Number one reason is people are home due to lock downs, Unemployed, Working from home etc and they are cleaning up in thier homes since they have an abundance of time on thier hands...