Right... why would you want to only reward your users who work hard? That's idiotic.
Why wouldn't you want to make the site easy to use, with high-quality data, for everyone? When that really wouldn't be that hard to do.
When I was apartment-hunting, over the course of weeks, I literally learned how to recognize particularly spammy brokers by the formatting of their headlines, so I wouldn't click on them... (Four asterisks at beginning and end? Ignore. All-caps with a strange abbreviation for bedroom? Ignore. Etc.) This is a skill I deeply wish I hadn't had to learn. It's ridiculous.