Its not proprietary but flatpak is "taking the android route" as in providing a "app store" with sandboxed apps and standardized runtimes whose permissions can be limited and expanded at runtime by requesting the user. they already have a system for tipping devs and IIRC also wanna include a way to pay for apps.
The proprietary version of this would be Ubuntus snaps, but since the proper functionality of them is limited to ubuntu as the only distro i doubt they will take off
And you also might lose your job