1.Discord link spam:

2.That particular spam wave was bots that would post thousands of images that all link to one newly created domain:

NSFW

Images were sourced from the posts from a year ago. and they would try to grind karma in the freekarma4u subreddit, but always stopped way too early.

3.The latest memorable spam wave would crosspost copied images into a newly created subreddit:

ecchi

Where they would then peddle their website:

ecchi