Having more than one account isn't against Reddit's ToS.
If you use your different accounts in different subreddits and never have your accounts interact, you won't be banned.
If you use your different accounts in different subreddits and never have your accounts interact, you won't be banned.
If you happen to post to the same subreddit with another account at some point, Reddit bans all of your accounts.
I actually gave up using it because, perhaps in part because I'm behind a VPN (required in my country), any new accounts I create get banned very quickly once I start commenting.
There's nothing of much value on that website, but sometimes I try creating an account to comment on something.
The android reddit app annoyingly doesn't check for account matches. If you click a browser notification link on Account A it can open a reply form on App account B.
This might easily happen if you like to participate in political discussions.