I wonder how the count is set up. Does that include domain broker reservations, trademark holders, defensive registrations, etc.
Either it doesn't really matter to me. .XXX is not competing with adult companies, it's competing with .COM and I'm happy to stick with investing in the development of our .COM sites.
Dot Travel story
http://www.travelindex.com/blog/dot_travel
http://www.nic.aero/news/media_profile/q_and_a
With over 60 million domain names registered the .aero suffix removes the user from the anonymity of the Internet , businesses and organisations adopting .aero will always be found in one place and be instantly recognised as aviation companies.
I'm sure .XXX will make itself lots of money no matter what.
I can't even find a relevant .travel or .aero domain I would ever visit. I see Utah registered a .travel, but I don't plan to visit.