That's podcasterwallet that StevenB linked above. It's a shim for people to add a ValueBlock to their RSS feed if they can't edit the feed themselves aka people using Anchor.
It's also what Fountain uses for the "claim your show in Fountain"
Discussion
Ok yeah sorry he did say that. Ok I recommend to nostr:nprofile1qqsxy7ne6gpx2a8alpe28ku92gr6smmpqeqtc9tf7fqfxyd2m3r87espz3mhxue69uhkummnw3ezuvrcxajju7re0gq3xamnwvaz7tmjv4kxz7fwda5xyefwd4jszrthwden5te0dehhxtnvdakq0mr8v8 to check out podhome and showed the hosting companies pages that support the value hosting.