I recently had a similar experience with eBay, though it got resolved: -I had an old eBay account that was closed through inactivity -I wanted to buy some headphones so I decided to create a new account -When I went to eBay it had already given me a username through some sort of linked google account feature that used the google account I was logged in to -I tried to buy 2 $40 headphones and it wouldn't let me, sayin…
Why did this shake you so bad? You talked to a rep and they fixed it. That's what customer reps are for. If you have humans combing through records for malicious activity and reading off a rubric, you probably would've had the same issue.
Second, I realized how powerful these big platforms like eBay are. I looked around for alternatives in case I did get permanently banned and I sure didn't find much. What was particularly creepy to me was how being an undesirable to eBay could potentially spread: they track your account, name, address, credit card number, IP, and so on and seeing any one of these can lead to bans on other accounts. In a lot of ways this makes sense, but in theory, if I happened to log on to my banned account at my mom's, it could match my account with her IP and ban her account as well. I doubt this would happen in eBay's case as support reps would probably help her if that happened, but it definitely brought to mind the Chinese social credit system where linking to an undesirable can make you an undesirable yourself.
Third and most important was personal. I'm engaged to someone who is planning to use eBay. I wouldn't care too much about being banned off of eBay but I would hate to see her life become any harder just because of some weird glitch.