* Clearbit - Browser extension scrapes your emails for data and they sell it to others via their "free browser-based add-ons, extensions, or plug-ins" - https://clearbit.com/privacy
* Hunter.io - Scrape people data from your browsing activities to resell.
I don't know about the others, but I'm not sure LinkedIn qualifies. They have a direct relationship because people have profiles that they voluntarily created.
It might be different if they were selling information from shadow profiles that they created from other people sharing their contact lists, but I don't think they are selling that.
I’m not sure that any browser extension (Clearbit in your example) would have to register. It’s pretty clear that you have a “direct relationship” with them when you install their extension.
How about Microsoft? With all the telemetry in Windows 10 and what they know about the end users, the only question is whether or not they sell the data to anyone, I guess?
I had to make a few clicks to find the definition, more details here (scroll down to section 1c):
http://leginfo.legislature.ca.gov/faces/billTextClient.xhtml...