Well with France making it illegal to use Google analytics, I expect many more websites to move forward with forcing you to login. They force you to have an account, which makes you agree to them tracking you, and they'll use you being logged in to track that. When they can use third party analytics it's not as important, but still obviously a plus to them to have people have an account.
*making it illegal to use Google Analytics because GA moves identifying data to the US. Tracking with an account doesn't solve this. Let's not be reductive.
