DHT crawlers/indexers already exist to perform that function; they crawl and store infohashes (+ metadata when they receive it) and allow users to search that metadata to return relevant infohashes
By announcing itself, the indexer makes itself more likely to be handed out as a peer to anyone else interested in that infohash. Every connection attempt it subsequently receives is evidence of another peer announcing or joining that torrent. In effect, it "baits" peers into revealing themselves
It's an implementation of the 'Library of Babel', as described by Borges in his short story of the same name. It is a library of every possible permutation of a limited alphabet, of books 1,312,000 characters long. The FAQ page [1] and the GitHub readme [2] explain it in much more detail.
A companion tool for the space sim game Elite Dangerous — useless to anyone that doesn't play the game. I have had a couple of donations from kind users.
