The dev tracker returns an arbitrary number of pages every time, probably as many as it finds within a specific time frame. If you manually page it forward (i.e., append "?page=x" to the URL), it works. For example, ?page=42 currently takes you back to dev posts from April.
Obviously I can't authoritatively say whether any dev posts have been deleted, but I can say that a significant majority are definitely still there. It's just that the dev post auto-searcher is decidedly odd.
You, sir or madam, are an investigative, curious soul, and your refreshing resourcefulness gives me great hope for the gaming community.
An excellent find...
So it's there, and it's just a page rendering bug that isn't presenting us the navigation links to page back and forth.
Nothing is being hidden. The tinfoil hats may now be removed for improved comfort.