Take a look at the Terms of service for Grammerly as an example:
By uploading or entering any User Content, you give Grammarly (and those it works with) a nonexclusive, worldwide, royalty-free and fully-paid, transferable and sublicensable, perpetual, and irrevocable license to copy, store and use your User Content (and, if you are an Authorized User, your Enterprise Subscriber’s User Content) in connection with the provision of the Software and the Services and to improve the algorithms underlying the Software and the Services.
IF you have Grammerly plugin in your browser they capture EVERYTHING you type into a browser, and you've given them all of the rights to that data, for which they can sublicense at fee. I can't think of a non tech/data situation that has the breadth and reach that tech/data area's have.