Strypey#InternetHistory The torrent search site Torrindex was the first to offer only magnet links, not torrent files. Reported in Jan 2010 by TorrentFreak:
https://torrentfreak.com/worlds-first-magnet-only-torrent-index-100116/
TorrIndex, World’s First Magnet-Only Torrent Index
There has been a lot of talk about magnet links since The Pirate Bay decided to include them on their site recently. Various BitTorrent clients quickly added support for these type of links, and recently the first 'magnet-only' torrent index opened to the public.