People were upset and undoubtedly concerned having to find and learn something new etc after having and being used to a service for many years in most cases.They even tolerated the poor exchange rate and fees for convenience sake.
Humans are resourceful creatures and they simply went elsewhere and having jumped through those hoops albeit reluctantly, I doubt many will now unring that departure bell.
Besides, in Paypals own words it's still going to happen further down the road anyway! so I see no point at all returning.
PayPal it's too little too late, BYE!