Hello Christopher,
Decentralized storage as an idea looks interesting. I am researching about similar things for one of my Bitcoin project. Although an implementation or proof of concept code in the BIP would have been better. Also since this involves LN, maybe it can just be a LN project instead of BIP? Not the best person to comment on what can be a BIP.
Few links that you may find interesting:
The kind of decentralized storage that I think can be helpful for Bitcoin projects:
1.Uses torrents for files and communication required (with Tor)
2.Easy to use API to save, read, edit etc. something in a Bitcoin project using torrents. Only involve lightning network and payments when spamming can be an issue. For example: If a developer wants users to pay for every P2P offer they create using a DEX protocol.
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Prayank