Showing different results to google than you do to users is called cloaking and it's not allowed
https://support.google.com/news/publisher/answer/40543?hl=en
Apparently, we had something similar at Demand Media before the panda update.
IIRC, this stuff varies quite a bit from region to region, even within a single metropolitan area. Attempting to simultaneously comply with multiple independently developed rulebooks was ... fun.
I can't wait for shipyard startups to disrupt the housing market. /s
The free speech argument is certainly a dud here. The argument that has likely had any weight at all would be the antitrust/unfair competition one.
A click wrap will not change that.
It's almost certainly about linkedin's repeated claims about how they don't own these, they are public info, and they want to make them public, and now is turning around and saying "just kidding!", and trying to put someone out of business who depended on that, all so they can start their own analytics product.