And it works because it is deliberately valueless.
Thus, the in-game currencies are useless to you.
Hub Coin is a cyptocurrency that exists on anEtheriumtestnet, kind of the cryptocurrency version of monopoly money.

The only value it has is in No Man’s Sky.
Still, Hub Coin has some problems.
The community’s biggest concern before Hub Coin launched was environmental impact.

Personally I think the biggest problem is that it’s a cryptocurrency, but that’s me.