I've played a couple of test servers in my time, and really liked the setup. The only issue has been the low population. I'd like to suggest a server setup that lends from these test servers by being sort of subscription-based, and gold is added to all accounts in regular intervals. And it needs to be a low enough amount that it is considered a finite resource, one to be carefully spent. It would probably need some next-level staff monitoring to avoid AH abuse, but I assume there are already automated systems in place that report suspicious trades and bids. Maybe registration could be tied to something else, could be having completed a server with at least 5k pop, or a public forum account with a minimum number of posts, to avoid the most blatant multiaccounting. There are probably other ways to ensure legitimacy too.
Also, this should probably have been the setup for the tournaments.