Corporate open source investments: Linux takes all?

Quoting:Marco Iansiti (Harvard Business School) and Gregory Richards (Keystone Strategy) are in the process of writing an intriguing piece of research into open source corporate investments. The two researchers comb through open source's most active projects and discover something that is remarkable and yet not-so-remarkable at the same time:

The money is heavily concentrated in very, very few projects. Lots of Linux, in other words, and almost nothing else.

This is remarkable and unremarkable simultaneously because it means that vendors apparently share the same complements. One would think that the varied vendor strategies would result in a diverse body of open source investments (because, as the researchers note, corporate investments in open source tend to reflect a desire to invest in complementary technologies - e.g., Oracle investing in Linux to provide a cheap operating system for its database to lower the overall acquisition price for its databases). But this isn't the case...........