If someone chooses to buy a clone, it's their own fault to begin with. So I can't follow your logic there.
In any case, MT-Card started out as a clone. Then it evolve to a clone with some unique but crap functionalities. Then it regressed back to a clone.
Sure, MT-Card has a team behind them, one that actually cares about "updating" their card. But if they're still making money and selling, who wouldn't?
They basically reverse engineer what GW does. Kudos for them for having at least that much skill but they're a clone nonetheless. The only reason why they can't use GW's software is because GW is actually skilled enough to prevent it from happening again, at least directly.
If it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a duck.
If it works like GW, looks like GW and doesn't support as good as GW, then it's probably a GW's clone