(The old link does not redirect, and we got an email asking us to update it.)
Square charges 2.75% + $0.00, so the transaction amount breakeven point is $15.80 and Groupon is cheaper for amounts > 15.80, but Square is cheaper for amounts < 15.80
1.) The fact that Breadcrumb has a "Pro" option and requires me to schedule a demo, suggests that it's more of a complex system than Square.
2.) Breadcrumb looks to be targeted specifically toward restaurants.
3.) I bet Square will be around for a heck of a lot longer than Groupon will.
(The old link does not redirect, and we got an email asking us to update it.)