I think the author brings up a good point, but most of those are simply due to us using Google's services instead of other services.

>In 2014 Google Play banned sex-themed apps

This point, however, I think is slightly different. It's difficult for the average user to get apps on their android phones without the app being on the Play Store. On the other hand, people go to great lengths for sex stuff so I'm surprised there aren't very popular alternative app stores for android.