Visa and Mastercard merchant acceptance networks are the largest among the global card brands with 80.0 million at the end of the third quarter of 2021. This includes in-store, online and micromerchants that use smartphones and tablets as POS terminals. However, the 80 million figure does not include as many as 20 million additional small and micromerchants connected to payment aggregators worldwide, such as Stripe and Square, that don’t have independent acceptance location identification. This puts total acceptance locations above 100 million. Not included in that figure are more than...