The anti-spam filter is extremely simple: 5+ messages with exactly the same content and citations get you marked as a spammer in the app. The 5 posts need to be completely equal and done in a short amount of time. As a spammer, you go into a temporary block list that remains active until the user app closes. So, if you delete your posts, you get back to being seen by everyone. Now, this does not affect your followers. Following you takes precedence over any block list. Which means, your messages only disappear from the Global feeds and public chats of the people that are NOT following you. Simple and extremely effective.