These days, a lot of products rely on talking to servers in the cloud for functionality. These products very often become unusable when a product is canceled because they lose a great deal of functionality. Only products which have sold well seem to have those servers remain operational for an extended time period beyond when sales end.

But they gave customers a total refund and then even extra credits on top of that.

This is a cloud connected device so it seems like an entirely fair outcome.

If they didn't refund customers then I would be complaining too, but that's simply not the case here.