Andoid users install google play because the applications they want to use is only available on google play, regardless of personal choice. Andoid developers put their applications on google play because that is the only places where they can access enough number of users, which has nothing to do with developer choice.
It is not about price. It is about platforms. A 0% app tax could not compete if there is 0 users on the platform, and google could increase the app tax to 100% if they wanted and people would still use it.
It is not about price. It is about platforms. A 0% app tax could not compete if there is 0 users on the platform, and google could increase the app tax to 100% if they wanted and people would still use it.