Keep in mind sites like Reddit and HN are pretty addictive in a chemical way (so can your email be). When you see something interesting or that agrees with your

Keep in mind sites like Reddit and HN are pretty addictive in a chemical way (so can your email be). When you see something interesting or that agrees with your identity your brain gives you a hit of dopamine. You browse and look for the funny or fascinating because you remember finding somehting great earlier. It's funny because Reddit hates advertising/mass manipulation etc but are being manipulated by the group all the time in many ways.