It is not common for American for-profit corporations to accept donations. What you are paying is a retail price for Apple products. (Post edited after a check of the legality, but donating to Apple would still be highly unusual, and if the parent admits to doing this, he’s not going to get any less grief.)

So yeah, if you donate money to Apple, Inc., Organic Maps makes sense for you. For everyone else, it seems like a scam.