Improving UX in sites that invented UX

LinkedIn - aggregate the years you’ve worked at one company when congratulating you on number years spent at the company; even if you’ve gotten a promotion or changed positions, causing for your titles to change and for you to make a different entry in your Employment History

Netflix - keep track of the movies watched and remove them from the algorithm when suggesting movies to watch; keep a customer-facing track of movies watched and their ratings; allower viewer reviews, like Goodreads

Kijiji - require users to sign in so they are able to access a customer-facing profile of postings they visited; also allow users to favourite or save postings