This kind of limitation is common in superhero RPGs such as Champions or Mutants & Masterminds, but those are generally built on a much finer point scale than DFRPG.
I checked out "Strands of Fate" because it is attempting to be a sort of all-genre FATE enabler. They do have a Power modifier called "Limitation," and this would maybe be considered a Minor limitation, about equivalent to taking something with a [+1] Item of Power limitation, except Item of Power still has a lot of advantages.
I think this may be too small a limitation to count as a +1 Refresh discount, and certainly no more than that if allowed.