Originally Posted by j.p.s
Maybe this is a trial towards cutting their number of models in half. There would only be "special offer" models and people that don't like it can pay $30 to make the ads go away.
I suspect SO is turned On/Off when Amazon staff assign a name and email address to a K4 prior to shipping. That way it is all software controlled and the same hardware can ship as either SO or not SO. That's a pretty smart business model!