Depends what u mean with stuff:D
the idea is that it is both used ingame, but there only as a sink. I.e. to craft items you need to add a mixture of materials and other stuff but then also burn some zing. Other things will require some as well like unlearning healer talents, creature moves, professions, etc.
But then also as a way to market the game later by using any extra profits/revenues the game makes to burn tokens to make the economy worth more rather than making CEOs/founders insanely rich as we see in "web2". Now of course if this were to happen I'd profit as the founder as well since I've bought a lot of zing but emphasis on bought compared to web2 people just giving themselves a massive amount of equity/shares for having created it.