I actually stopped last month when they kept requesting SSN for anyone who has sold over I think 20k or something like that. I have sold around 90k on there since 2010. I'm definitely not anywhere near a big customer, but if enough of little guys like me stop using it, they will suffer. Even the big guys take a fall.
I use ebay occasionally, but tbh the site has been stagnant and shitty for probably 10 years minimum, maybe 15, when they changed the listing fee schedule and then amazon prime came out. Literally no updates to the site's infrastructure, it navigates like a hodge podge mess of years of bad housekeeping. That says a lot about their priorities.