The main benefit these services provide is undeniable: merchants can accept Bitcoin and their business model doesn’t have to change. The Lightning Payment Gateway serves both parties from behind the scenes; the buyer spends BTC and the merchant receives Fiat money. That means the app also solves the foreign exchange market problem.
Tourists, for example, could just download a Lightning Payment Gateway app and pay using Bitcoin while the receiver gets the local currency. Of course, Bitcoin is global money; it would be more convenient if everyone accepted it everywhere, but that’s not reality. While we wait for the world to catch up, Lightning Payment Gateways can bridge the gap.
It's a catch 22 situation!