Reference: http://blue.cardplace.com/newcache/us/106771823.htm
Panos is selling his team.With the end of the first season players who have contributed to at least 20% of the games in the top teams from each battlegroup will receive their end-of-season rewards. These include Arena-specific titles that they can display proudly until the end of the new season, and for the best of the best, an Armored Nether Drake.
Now if I read the above quoted piece of blue, the italic emphasis, I'd say that selling a team and paying gold in order to cheese the title and mount is not going to work.
Might be just the wording - but can you imagine the drama involved if the buy-in gimmick didn't work?