Marketing strategy? Good luck with that.
This has been 3dx's problem since day 1 (apart from the crappy disconnection problems). 3dx is still pretty much at the forefront of its game - other comparables, like Achat and RLC, simply can't match it for graphics. Others, like ChatHouse, are badly designed with a user interface that's a nightmare to actually use.
I had this exact conversation about marketing about 5 years ago with a player who claimed to be "close" to the developers (he certainly knew stuff that noone else would know). I told him they needed a functioning business plan, free trials, more content, and a massive marketing campaign. With the move towards AI and virtual worlds, it's a huge opportunity.
Rather bizarrely, this player listened to what I had to say and said, 'Who on earth are you??' like I'd just discovered the Higgs Bosun or something. I'm (or, I was, then) simply an IT specialist who knows how to market a business. It's really not rocket science. And sex sells, though the marketplace is rather crowded, but not insofar as these types of games go. And basic principles aren't difficult to understand - invest more now to generate more customers = more revenue = more game development = more customers etc etc.
I don't think the developers of 3dx will ever grasp these basic points; in any case, it's pointless until they fix the server problems. From what I hear, it's still run by a tiny team of 2 people, maybe 3. The pool of talent that almost certainly exists in the player base are not utilised properly to expand game options, even though there are probably willing contributors. Why, I don't get, unless the devs are worried about claims to ownership and intellectual property. It may simply be that 3dx is still a sideline and not their main income, which would worry me as to what the long-term future of the game is, or whether it will, at some stage, be abandoned if commitment/time diminishes.