Personally, I don't particularly care if companies have my data. However, I vehemently don't want them to use it for algorithmic recommendations—including ads—because it puts me in a filter bubble.

All these technology companies are making assumptions about the type of person I am, and then molding me into that person. I can't learn about topics I don't see, so if the tech giants are convinced I like technology and computers, that's all I will ever learn about.

Maybe I'd be happier if I took up ballet dancing, or basket-weaving, or something else I can't begin to imagine. That seems much less likely to happen when I'm trapped in an algorithmic box, that assumes my past will dictate my future.