Cool project!
With obtanioum the indexer is fully decentralized, it lives in the phone of users, like rss feeds.
So, the real use case for this solution, as I see it, is to offer a nostr-based layer for indexing/distributing (npubs based chain of trust and so on....) but ALSO and more important, to offer a better way to store and trasmit the data itself (the apk in the android case).
Until it remains a layer-over-github it wouldn't solve any problem. Github could be censored and could limit the avain any moment, even when the fetches happens from relays.
A future integration with bittorrent 2.0 to permit to the distributors to be fully uncensorable and indipendent?