That’s kind of funny. There’s absolutely no Wink branding on the packaging anywhere and it’s not stocked on the Wink endcap. They really shouldn’t care as this appears to be an entirely standalone product.
Anyway, I have gotten it to pair to the ST hub and it will act as a secondary controller for connected bulbs (I’d imagine Zigbee switches, too), but ST does not see the change in state (at least with GE Link bulbs). It’s clearly grouping the bulbs as they all respond instantly with no lag. So for now, it works great as a backup switch (would work during a ST outage) or a sort of scene controller, but don’t hold your breath on using it as a generic button controller for now.