Big Blue ain't as big as it used to be? And vs MS it's smaller.
Who's being shut out of the market with Ubuntu?
Who's being trampled on?
IBM is mainly a hardware vendor, and I see no problem with them competing on that level and reletively little for the software. Will IBM machines force users to keep Ubuntu installed and keep other OS installs off of their machines?
Ubuntu is already free. How is IBM's use of it reducing the cost? Also if you look closely the cost isn't zero for IBM, far from it. IBM still has to do support work and programming for the Ubuntu platform same as they'd have to do with MS.