They are designed to play on your emotional state of urgency and your anger at letting yourself go. All they do is separate you from your money.
You can lose belly fat and thigh fat by following simple, sensible strategies like my 10 Fat Loss Tips.
There is no reason to turn to questionable and dangerous fat loss methods just because you want it off faster. Progressive weight loss of 1-2 lbs. per week is safe and sensible.