The alternate app store with a focus on privacy could be a big plus, depending on how broad of a selection it ends up providing. Neither Google Play nor Amazon Appstore respect your privacy at all. F-Droid is great for open source software, but has some big holes (Signal is an obvious one), and side-loading isn't the best option for security reasons (no automatic updates). I have no problem with proprietary software, or with paying for it, if I had reasonable guarantees that it wasn't spyware, and didn't require installing spyware to obtain and stay up-to-date.