What's the value of GoPago over Square for that 50k merchant? Mobile Storefront -- which has been a fantastic discovery tool to connect consumers with merchants on GoPago. It allows people to place orders on their phone to the POS terminal itself, no phone-calls necessary. We also have a much more robust reporting suite, support for scanners, support for wireless chit printers (so merchants don't have to ferry order receipts to the kitchen), a modifier system (this is huge if you do any sort of volume -- on Square's software, you need to manually input modifiers and their prices every time you ring up an item with modifiers like condiments/toppings).
Also, the cost difference in Square's favor is not realized until the end of the first year. If you're starting a business, the outlay needed for Square is precious money that could go elsewhere in your organization.