Well I built search bots at…

Well I built search bots at https://sb.nostr.band, which quote other notes. That's not the same thing that you're suggesting, but it's similar - a way to discover content that doesn't get into your feed naturally. I saw minimal traction, almost no followers on bots, and quite some complaints and mutes. But those might have been coming from the fact that they mention other posts/users.

I also have a list of some bot accounts here if you'd like to do any research https://nostrudel.ninja/#/lists/naddr1qqzyymm5wvq3vamnwvaz7tmjv4kxz7fwdehhxarj9e3xzmnyqgsrx4k7vxeev3unrn5ty9qt9w4cxlsgzrqw752mh6fduqjgqs9chhgrqsqqqafsp37r5k

There are also tools for twitter-to-nostr already, and quite some twitter-mirroring bot accounts: https://nostr.band/?q=rss+twitter&type=profiles

I think that experiment (at least a simple/stupid) version of it has been run and saw no traction. Maybe it should just get more sophisticated?