Then you haven't looked very hard. There are hundreds of examples just within Apache of corporate donations to Apache projects. In each and every one of those cases, the Apache release (which includes part or all of that code) is not controlled by the company making the donation. This case is absolutely no different. Google Wave and Cloudscape/Derby are two huge examples I can think of immediately.
I am sure there are lots of similar situations outside of Apache (but I'm less familiar with those).
Now what "biased gatekeeper" are you talking about keeping code proprietary? What absolute nonsense. The entire purpose of all the people who work for Apache is to release code under a liberal open source license. There is no great secret conspiracy. If you see something valuable that you want in LO, then go and help the OpenOffice people integrate it into the code base which LO will merge at some point (assuming LO will continue as Apache OpenOffice with additional patches).
You are so negative toward the Apache volunteers working toward similar open source goals (mostly in their free time) for the benefit of both the Apache OpenOffice and LibreOffice projects. What is it exactly you think the project should do differently?