When I worked at Corel (many, many years ago), I was stunned by how much we paid to put Word Perfect on OEM computers. It certainly wasn't worth it from the perspective of a single sale. I think we easily spent more than we recouped from sales. The thinking was that the person who bought would also upgrade, though, and I think that was sound reasoning. Vendor lock-in is a powerful force. Personally, I thought it was a waste, though. Cost of sales was a large multiple of development cost... :-P