But "buy.com" is a brand, and extremely valuable both as a brand and as a domain.
Maybe this was due to poor marketing on Buy.com's part?
This finally explains to me why I've been seeing all the graphics for the Buy.com campaigns change to 'Rakuten Buy.com'. I didn't know that Buy.com is a Rakuten brand. Honestly, I didn't know it was a company outside of Rakuten LinkShare. TIL.