To answer the OP:
The mistake people often make is that they get all hyped about this new supplement they buy. They get motivated to lose weight and fix their diet. The supplement comes in and they run it for 4 weeks with a good diet and lose good weight. Then the supplement runs out and it isn't "exciting" anymore, and people feel like (consciously or sub-consciously) they can't do it without fatburner help which is so far from being true. Then the diet goes to **** till they can afford another "stack".
If you can keep diligent with the same diet you implement during the "stack", you will not only be able to keep, but more than likely continue to lose weight.