Spam is not appreciated by the community and could be flagged or may result in action from the cheetah bot..
Some things that can be considered spam:
- Banner ads
- Referral links/codes
- Links to known scams, phishing sites, and other dangerous links
- Repeating the same post
- Repeating posts with random, nonsensical words/content (gibberish)
More Info: Abuse Guide - 2017.