One use of them is this:
"Validators" of the network, ie the nodes that make sure games have no bad actors and the jury'ers get paid in 1st tokens, this means there is work required to earn the tokens, giving them value.
This
and
From their discord
>Tokens work just fine we just have not implemented them into the platform yet.
>right now we're just using "play tokens", development for the real money portion of the platform is already underway.