I installed the official Reddit app and went on it to see what the old place was looking like now. My inbox was filled with spam. The "home feed" shows subs I never subscribed to. There are so many ads. Between the ads and the the extra subs in the feed, it's hard to just scroll. I also noted a lot of spam in some of the subs. Maybe they are subs with no mods? I'm not sure what's up with that.
I made a new account and was immediately bombarded with posts from subs on the account I deleted months ago, suggesting them because Reddit knew I visited them in the past.
No, that’s not creepy at all. /s
Clear cookies?
They check via IP as well, and possibly also browser fingerprints.