Near the end the test server got to be pretty fun, building up cars at least. But it still was treated like the rest...people hoarding rare cars, rare parts, etc, instead of using them. Had they routinely wiped the server, that shouldn't have been a problem.
General rule for online gaming is- if you make it rare, people will hoard it. Then, they'll sell it on ebay. Seen it in every online game I've played. Even on a MUD, they hoarded rare items. A damn TEXT game. Yikes.