In addition to what SteveA said about it being a "Special Interest" forum, it uses a 'limited response" rule. By only allowing each member a max of 5 posts a day the moderator discourages a lot of people from making short responses like "LOL" "X2!" or other short non-contributionary posts. People have to think if they really have something to say.
If you look at the topic lists you'll often see someting like 4 responses but 500 views.
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