They used to offer surveys, maybe once a year, where they would send me an email on a topic such as any upcoming home improvement projects I was going to do, or if I would be looking at installing new windows in my house. (I assume the window surveys were paid for by the major manufacturers based on the questions asked.)
The surveys were relatively short, like most that are sent out by other MS companies, but Imyst would send a $5.00 fee as compensation for completing the survey. I haven't received one of those emails in a while, but it was a nice bonus when I got one!