Content delivery networks are very "behind the scenes" and are exactly why the layperson would not generally understand the high selling price of this particular domain.
In this instance, the .net TLD was definitely the most suitable, but not in such a way that it justifies six figures, IMO.
While it's a big business, it doesn't have the same "general public" appeal that the same $185k could have bought otherwise. Millions will benefit from content delivery networks, but only a handful will actually "use" them, per se.
No doubt that the name is bragging rights. But not an expenditure I would sign off on personally, if I were a decision maker in the company who had bought the name.