I advocate for that since years. We need to normalize to pay for OSS. The biggest issue I see is not that people are unwilling to pay (donate) for the software they use daily, but the the payment itself is to complicated. There is not “the one” app store for OSS that every OS uses that makes donations easy. Additionally taking care of taxes for donations is too much of a burden, so the app store needs to handle that as well. And voila: You have the Apple App store or Android Play store.

Any advantages over distrobox? Sounds very similar.