I bet they gave it up. Publishing companies made a lot of sense back in the Shareware days but in the full blown Internet age with super easy self publishing through app stores they don't seem as necessary anymore. Maybe you get a bit of a marketing push, but quality and support and responsiveness matter more these days. This reality has led to the deaths of some of the great old Mac game companies like Ambrosia Software and Freeverse and others, but such is progress... I suppose.