This kind of “internal sub goal” idea crops up for Do More goals too, when folks are trying to balance their twin desire to do the thing X times per week, accomplishing at least Y units per week. In traditional Beeminder terms, that’s two distinct goals, though that can make for a cluttered gallery.
One of those two implied goals may be the thing that you’re akratic about, so you can dispense with the other. If you need or want to have both goals, then you can ease the pain by feeding both goals with a single datapoint, either via an API script or an IFTTT recipe.