Let's look at it from their point of view. The people who are doing this for a living need to pay the bills. Air time is extremely expensive and unless you have pretty deep pockets, you need to have someone else foot the bill. My guess is that they don't all 100% believe in the products they endorse. But, its naive to think that one can pick and choose their own sponsors. So, sometimes sacrafices have to be made to pay the bills.