Manual:$wgUseCommaCount

Details
Under which condition should a page in the main namespace be counted as a valid article?

If $wgUseCommaCount is set to true, it will be counted if it contains at least one comma.

If it is set to false (default), it will only be counted if it contains at least one wiki link.

Changing this variable does not retroactively affect the existing count.

initStats.php will update good articles to be somewhat close to what it should be if this variable is set to false (It counts outbound page links, where presence of  [[  is whats really counted).