also using things like vcaptcha v3, which tracks your movements on the site. thats one aspect, if your using the app, they will be able to look at your device signature too. if you have more than 1 acc on an email, it can compromise them all(if one gets banned, perma ban all of them can take a hit). additionally they are purging many accounts right now too.
they can still ban all acc if your using the same VPN, . they are extra aggressive this time around.
they have vcaptcha v3, which im told it silently records you in the background and check for botting behavior, plus if you login with the same vpn+ip that has compromised reddit accounts. theres anti-detection browsers, mobile proxies, and additional need to let your account simmer after creating.