Yep, those semi-autos in popular calibers can be hard on the wallet even in good times.. aside from local law enforcement, I imagine the 3-gunners out there are suffering the worst between practice and actual competitions if they were not heavily stockpiled before the madness began.
I noticed the brass farming really became a bigger deal in 2008 when comodites prices were screwing with the market along with the election run-up, hasn't really slowed down much since. Used to be I'd rarely find another soul at a range who bother to pick up their brass, now it's very much the exception even if someone doesn't reload because they've realized there's some money involved if they scrounge up enough of their once fired stuff and throw it on Craigslist/Armslist/etc..