Why? They have other members that are pretty openly hostile to open source, and specificly linux itself.

Such as vmware and allwinner who refuse to release kernel sourcecode for their products.

I've worked for a non-profit in a controversial space (interaction of faith and science). While my colleagues always strived to tell what they saw as truth, there was always an acknowledgement—unstated—that donors' reactions informed our approaches to addressing issues. Not that we compromised our values, but we couldn't operate in a vacuum.