My guess is this:
1. No zero or low value, pointless or uninteresting posts or threads. [1][e]
The context seems relevant so we can not tell it off-topic or low value posts. The examples were given are:
1. Such posts as "SELL SELL SELL", "I agree", "+1", "Support", "Watching", "Interesting", "LOL", "SCAM", "LEGIT", "FAKE", other one word posts, posts consisting mostly of swearing, quote pyramids, useless introduction threads, threads about a topic already recently discussed in several other threads.
All of these should consider spam if there are not enough thoughts and not relevant to the context.