Their Imperva WAF usually challenges me repeatedly during use trying to buy groceries from my pc, and most of the time I get tired of having to disable every security extension I use with Firefox to use Albertsons because of their shitty website. Never outright block though.

Might be worth checking some enterprise threat lists for whatever IP's your popping up on (ie Imperva and Cloudflare), or something uniquely fingerprints you from your browser. I use multiple extensions to block whatever they each can, and even I'm not treated that badly as you for wherever you are coming online from.

Here's Fortinet's you can check your IP against, they all tend to roughly use the same lists eventually: https://www.fortiguard.com/iprep

Immediate bans might be related to the country you're in. This is a US retailer, and there is zero reason for someone outside of the US to visit that site. Blocking foreign visitors allows them to ignore GDPR, for example.

In this case, they may display a message like: 'This page is intended for USA visitors only. Our services do not operate outside the USA.', but no, they say you are banned because just...