system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: how did Ask Bongo and similar services that were popular a number of years ago find out so much information about me so quickly?
gpt
I worked for one of these. We googled you. You'd be surprised what we could find out, especially when Myspace was still a thing and nobody had anything on private. Also remember it's not just your own profile, it's anyone else's that has your full name. 

We also could see your message history with us. A surprising amount of texts came from people who'd texted the exorbitantly expensive service before. If you ask "Does John like me or does he just want to be friends?" then two weeks later ask us what we know, bam, we'll say you have a good friendship with John.