The maker of 'Fortnite' is now letting players bypass Apple's and Google's app stores, the latest escalation in an ongoing battle between the tech giants and app developers (AAPL, GOOGL)

· Epic Games, the company behind "Fortnite," is offering a new way to make in-app purchases that bypasses the controversial 30% fee charged by Apple's and Google's app stores. 
· The company announced Thursday that players will get a permanent 20% discount on V-Bucks, the in-game currency in "Fortnite," if they pay directly...