Earlier quoted context omitted.
Any good examples of closed source applications being financially successful on Linux? How do the opportunities on Linux compare with investing in applications for other platforms? It's not so much about "caring" as about the ability to pay programmers to create profitable software.
Loads. Mainly very expensive high end niche scientific packages (scientists tend to use Linux at a higher percentage than ordinary people so the market percentages are more favourable).
Examples include Matlab, the Avizo image analysis suite, a certain simulation package that was described as AllSIM in a controversial discussion relating to CERN last week on HN and Maya (not scientific but it does illustrate the sort of high end very expensive niche stuff that tends to have Linux versions).