You can earn postcard rewards just by finding glaring problems in one or more store listings.
It's actually a lot of work putting together the information for these lots, and sometimes we get it wrong. For example, the title says Cleveland, but the picture shows Columbus.
We'd be very happy to hear if we've made a mistake like this, so, if you're the first to report one of these kinds of problems, we'll include some extra (reward!) cards in your next order. Be sure to add a reminder to your payment invoice.
Happy hunting!