There's a neutral way to do this. They could pop up a surprise dialog that says something like:

  These apps used your location.
  * "Popular near me"
  * Maps
  * Google Maps
  * Chrome

If I saw that dialog, I'd probably be tempted to disable the Popular Near Me feature, which I've never heard of and therefore I assume provides me no value and, at a minimum, might be cutting into my battery life. But Apple doesn't present me with that dialog because they don't want to impair their own advertising business.