User blog comment:Ducksoup/How Your Community Can Get An App/@comment-26169720-20160811192309/@comment-168424-20160812230338

Also. topics that look like they are likely to be breakout hits tend to have more staff support. This staff support can help make sure the underlying wiki has a good amount of baseline content.

That said, some lifestyle apps clearly were added because staff wanted them to exist and it's not clear if they met all the other criteria.