I'm a writer and editor at Heritage (look it up). I've never seen anyone get pressured about anything w/r/t Microsoft here. A few months ago, someone sent around an email touting Mozilla--no pushback from anyone at all.

I can't speak for any of these other places, but there is no Microsoft influence at Heritage.

For what it's worth, Heritage has long been suspicious of antitrust law. Perhaps this encouraged some MS funding, but that didn't change any positions here one iota.