Also keep in mind, I believe Weight Watchers, for example, will allow you so many extra points based on your exercise level. Spark increasing your range is basically the same thing, only it's making it less optional so you can actually maintain that level of activity. Just like a car, if you don't fuel your activity, you won't be running so well!
We all want to lose weight *now* but a slow loss really is the best approach. It's easier on your body and you're more likely to be able to maintain your goal weight once you reach it. What's the point of losing weight quickly if you just put it right back on again?