The Linux Game works like this: Players compete to make their business commercially viable in a world of Open Software. There are no rules.
IBM has done well playing the Linux game. Although in theory Linux doesn't belong to anyone, in practice it belongs to those that can profit from it most and thus it belongs most to IBM. It belongs to Hewlett Packard and Dell too of course. It doesn't belong to Sun Microsystems much and it belongs least to Microsoft. Just to confirm this, Steve Ballmer recently said, yet again, that Microsoft will not port its products to Linux.
"IBM can make money out of Linux by using it to sell hardware, and it has done so to great effect. Linux revived the mainframe. About 20 percent of IBM mainframe sales are down to Linux. More remarkably, about 65 percent of its blades in its new BladeCenter sell with Linux loaded at the customer's request. IBM claims to have sold over 10,000 blades this year, which means a good deal of Linux.