All these companies are big enough to potentially have a separate patent agreement with Facebook. I don't have any insider knowledge about them (or anyone else, for that matter) to say whether they do, but you should entertain the possibility rather than assuming their risks are greater than yours.
The person in question was talking out of school, and so I have to be very vague (and you can take this for what it's worth because of it, you don't have to believe me), but at least one of those companies listed in the prior post has no such agreement with Facebook.
