Fat people make the best consumers of almost everything. The more active and energetic someone is the more chance that they'll do things for themselves instead of paying for it. Plus the standards between the average fat person and the average fit person tend to be very different. Fats are usually happy with the cheapest plastic crap or food that's basically just flavoring packets sprinkled on the lowest quality food in order to mask the actual taste. Fat people are the best consumer demographic to target and I'm sure most companies who give it much thought want to push for as many people to join that group as possible.