I can't possibly see their acceptance becoming limited. Visa and Mastercard rely on the fact that if a card her their logo on it, it's accepted by all their merchants. They would never allow a merchant to have a chart showing which Visa cards they take and don't take, nor could the merchant charge different amounts based on which Visa was presented.

The only choice a merchant has is to either eat the difference or pass it along to everybody. Betting they are passing it along to everybody.