Board Thread:General Discussion/@comment-24739709-20151201202536/@comment-13301-20151207104249

The ultimate reason for this change is money.

All the different wikis about the same subject will now have a very similar title, so the main wiki will virtually "extend" to all the other wikis with the same subject (which are probably abandoned, or has duplicate content). That will increase visibility of pages of those second line wikis, increasing the ad revenue on those pages. On the other hand, the main wiki can suffer from dropping some views that will get directed to those other wikis