the price for the spectral tiger is currently over 10 000 dollars. it becomes soulbound when used, people have no advantage in the game and can't earn anything with it and the in game economy is really fucked up!!!!! i think that's all you need to know to know that a good game makes more money than a game that only relies on economy.

now just imagine this spectral tiger would be an nft. the price would be even higher

and blizzard even sells gold itself. you buy a wow token from blizzard for fiat and exchange it in game at the auctionator for gold ;)
people spend masses of money there without the chance of profit ;)