Question-and-answer sites typically rate low in engagement because users tend to visit in search of a particular piece of information and leave as soon as they obtain it.
Then it checks the information uploaded into the lander by the rest of the hive and decides to either start a new search or visit a cave discovered by another robot.
And these consumers often visit a retail store like Wal-Mart to find the specific item they want, then search online to find the site with the best price.