I think that this is in large part due to hurdles of paying for software easily. For example https://play.google.com/store/apps/details?id=com.iiordanov.freeb

I think that this is in large part due to hurdles of paying for software easily. For example https://play.google.com/store/apps/details?id=com.iiordanov.freebVNC&hl=en_US https://play.google.com/store/apps/details?id=com.iiordanov.... and https://play.google.com/store/apps/details?id=com.iiordanov.bVNC&hl=en_US https://play.google.com/store/apps/details?id=com.iiordanov.... are the same GPL licensed software either gratis or for $5. Just buying it via the store is straightforward instead of figuring out where the homepage is, finding a donate button, entering credit card details... . Having more non-gratis but free software would be a good thing https://www.gnu.org/philosophy/selling.en.html https://www.gnu.org/philosophy/selling.en.html