I agree with @NeuroticFish, spam isn't only define because of how many pages or posts has been posted on the thread, but it's mostly because of the post quality. The judgement to know how high the quality is from both campaign managers (if the user join a signature campaign) and the moderators (which they has a power to delete someone post). As long as the campaign managers count his post and the moderators didn't delete his post, this mean his post has decent quality and not a spammer.