We like to use services that allow us to connect with many people and share our ideas and data with them. Technologies with a broad network are more appealing to use, as they enable us to speak to people that we would never have addressed otherwise.
However, most services run on a freemium base and we pay for this by watching advertisements, tolerating the fact, that our information is analyzed to make those more 'tailored' on the one hand and also made available to algorithms that search for a pattern on the other.