No question. But ultimately the underlying value of the service is what determines whether it matters or not.
If you wanted to win a significant share of the search engine market, which would help you more, owning search.com, or designing a search engine that was actually better than Google in a way that users can perceive?
No - ecommerce is about connecting buyers with sellers. The domains capture the intent, auctomatic provides the inventory to take advantage of that intent.
Powersellers used to be tied to eBay, now they can connect to huge vertical audiences that are tied to their intent to purchase hence increasing their sales. Makes a LOT of sense this.
If you wanted to win a significant share of the search engine market, which would help you more, owning search.com, or designing a search engine that was actually better than Google in a way that users can perceive?