The use case I had in mind is to be able to import apps from their repositories, similar to what Obtanium allows you to do, by pasting a the link of the repo. As such, I could definitely replace Obtanium and switch to Zap.store, but I would still maintain Obtanium by the moment since I have some apps that I want to keep up-to-date, and they aren't available on Zap.store.
Another detail that could be interesting is the ability to attach metadata to files in the repository, similar to how Alby's PkgZap (https://pkgzap.albylabs.com/) allows you to do with all the necessary information to verify an app directly from the repo. This would provide a convenient way to access and evaluate apps without having to visit multiple sources.