Why? The whole premiss of Facebook is based on advertising. But, who wants to advertise to a civilization that doesn't have any money to spend on the advertised products?
Or, maybe the advertising isn't about physical products, but ideology? Oh, sure, that'll go over well when the advertising prompts the next revolution. How long until some administration starts buying obsolete microwave ovens, removing the doors/interlocks, and starts beaming interference up to those planes? :-(
Plus, what happens when the batteries on one of those birds deteriorates just a bit, and allows it to drop down into a commercial air traffic corridor, taking down a commercial airliner in the process? Can you say "Liability"? I bet there are a LOT of lawyers that can! US$60M? That'll be a drop in the bucket when the suits are finally settled.