I'm noticing more posts than usual, did Reddit do something?

no.. sometimes people just post things

when one person posts other people feel more comfortable posting, and more posts ensue

be the change you want to see in the world xP

This community goes through waves of posts. We have been very active lately though! I was on vacation all last week and at some point things got very busy here haha. It's always nice to see.

Reddit has been going through numerous changes that, generally, it's users dislike.

So there will be waves of people leaving reddit most likely; as they spin away from serving the user; to serving profits.