Reddit uses AI to make a summary of a users behavior that it shows to mods, and will flag people who seem spammy
eg,

Steps to make a successful reddit post
Step 1) Don't have a sus account
Step 2) Make it a image post with a nice catching image
Step 3) Don't include any links away from reddit in the post, don't even add it to the comments (have others do that)
Here is an example of a successful post, 220,000 views
https://piefed.social/c/fedigrow/p/1720677/post-mentioning-piefed-ca-in-r-buycanadian