I use the setting for eating my weeklies but not my FitPoints. I eat all my dailies, use my weeklies for overages / special occasions, and I do not eat any of my FitPoints. On average, I eat all of my daily and some or all of my weekly points, and none of my FitPoints.
Blue dots on the app's calendar signify days when I ate within a healthy range of daily points. My goal is as many blue dots as possible. If I do not get a blue-dot day, I do a postmortem on what happened and try to learn from that.