This is an awesome website-- put in a URL for a website you’re using, and see what kind of data that sites collects from you. This is super important if you want to be discrete about your research and don’t want to tip off owners of a domain what you’re looking into.
Just poking around, I made a fascinating observation. The Washington Post, long accused of having ethical compromises on account of its owner, Jeff Bezos, does not link its data to Amazon. Meanwhile, the South China Morning Post, which was recently sold to Amazon’s competitor Alibaba, does share its data with Amazon.