Earlier quoted context omitted.
Not really horrified. Yes they save it, but they don't seem to be able to use it well. The ads I get on Facebook are sometimes really interesting (i.e. targeted well), on other pages it's mostly stuff I bought a while ago or topics where I don't even have a clue why they think that could be interesting. And even though they can save it forever, it's outdated pretty quickly. If someone has information that I clicked a…
> they don't seem to be able to use it well You are implicitly assuming that this won't change. Databases persist indefinitely. > The information is only valid for hours or days. This simply isn't true. You seem to be only thinking about single data points, not the entire picture about your life that is painted when you aggregate that all of the captured data. For example, timestamps of your clicks build a pattern ab…
They can, but most don't, simply because it's not worth the effort and expense.