All of this metadata is being sent to the podcaster in the keysend TLV record. It's a lot more than a message.
With keysend being no longer widely supported, as we shift to lnurl, the podcasters would still like this metadata, and we're discussing how best to get it to them in a way that is private if they choose to keep their stats private, or if listening data should even be private.
ic. yes, that's a lot of stuff. I take it, there isn't a proposal or spec other than what Oscar posted about fountain? Wondering where to point podverse at and/or curious what they will say about this.