I had this idea when nostr first started. I think its still valid. Discoverability is still an issue on nostr. The lack of an algo is also. The community is full of interest groups. So transparent sharing of filters that allow you to view subsets of info of the global feed may help. If I take that filter and share it, people can view the params I applied and modify to their liking or just use mine.
My 2 sats anyway. I'll help provide funding for it if anyone is keen
nostr:nevent1qqsrxlsjx64syu9nrtw58hwrjc3lkuxeqyhpvge4hlnxs54tmjmpg0gp85wqv