Allow me to spell it out: if IBM could guarantee themselves a maintenance or growth of market share in the short-term while simultaneously clamping down on lice

Allow me to spell it out: if IBM could guarantee themselves a maintenance or growth of market share in the short-term while simultaneously clamping down on licenses that are anything but closed-source, they would. iBM didn't buy redhat because they think it's doing things the "right way". They bought redhat because they thought they could make money with it.