NSFW subreddits are a black hole in terms of advertising potential. No mainstream company wants their products on display next to porn.

A big subreddit like /r/pics going NSFW, with its absolutely massive userbase, takes out a large chunk of Reddit’s potential advertising appeal.

I don’t even use Mlem and want to help!

Just to add onto this good answer, you are really only expected to tip for sit-down restaurants with service and bars.

For takeout, cafes, fast food, etc., you don’t need to tip. A lot of places these have payment machines that just ask if you want to tip by default. You can safely hit “No tip” on these if you don’t want to.

Ostensibly it’s just to replace the tip jar for those who don’t use cash, but the prompt appearing every time you pay by card has convinced a lot of people that tipping is what you’re supposed to do in those situations, when in reality you have no obligation to.