What does the chain part provide that's not available right now through any page with an interledger link in meta and maybe an .eth link if you want to be fancy with anticensorship?
Is there a reasonable long term platform fee that you would find acceptable? Say 1% or 0.1%?
Also, the data is always available on-chain and the protocol is open so other people can write an alternative ui with their own blockchain query capabilities. Like Bress.xyz does with Mirror.xyz.
Payments can be automated on-chain.