I don't have trouble logging in, but somehow the website keeps forgetting my account, so I have to keep logging in everytime.

Well, it's a great alternative for people who can't afford a local server. I just set it to one-way sync from phone to PC, while for KeePass I just enable file versioning and use 2 databases to be safe from accidentally overwriting it.

users are forced to log in on the official Reddit app if they want to view NSFW content on mobile.

the OP literally said it's for all NSFW contents.