Maybe its a function of the maximum number of topics on the first page that can be displayed, including all those 'in bold' at the top which are 'general FAQ/how-to/rules' threads.
There's quite a lot of those now - about twice as many as there was a few years ago - I suspect the moderators get fed up with answering the same questions and putting out the same general advice about 'do's and don'ts' on each thread for newcomers, hoping they'll bother to read those in bold before they do something regretable or as a stupid question...
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