Anyone can submit a story but ideally it would have some kind of not-voting system for quality screening (long term users earn the right to approve/bury? No visible vote-counts to stop reddit-syndrome).
Fully anonymous, in the sense that it shouldn't leak your mobile number, device ID, name, any of that. A hash/something of your device ID creates a unique identifier for your account, stopping people making lots of fake accounts. One per device. It should also let you use a nickname, with no need to sign up (maybe by default it's like 4ch, your hashed device ID is your trip code, then you can optionally set a nickname if you want).
Mesh networked means it's good for countries with strict/filtered internet. Users should be able to sideload the app manually in case app stores are blocked (pass it around on a USB stick).
No idea how data would be stored, that's above my skills. Ideally not centralised, but that's probably unrealistic. I guess maybe something like torrents would work. You're constantly caching/sharing what you've looked at for other people within a few steps of your mesh point, but centralised databases spread around the world to fill in the gaps if no one has a cache of what you're trying to look at?
* energy backed cryptocurrency that incentivizes renewables adoption.
* "off-grid" P2P internets powered by mobile devices
* decentralized storage/compute that actually works ( IPFS? )