Earlier quoted context omitted.
But that's not "discouraged by the system UX" and what better way to get people to use f-droid than offering incentives to use it? Like your favorite app having better features when installed from there?
Sorry, but if you do not believe getting security warnings, having to go into the settings and mangle with configuration, just to be able to install a store downloaded from a website, sometimes go through additional configuration depending on your phone's modifications (looking at you Xiaomi) to then install the actual program you wanted is not "discouraged by the system UX", despite the real world experiences of com…
If someone wants f-droid they'll do it. The problem is most people don't know what f-droid is. It has nothing to do with UX friction of installing it, there is virtually none.