I just checked out GoPago vs. Square's Register page (https://squareup.com/register or https://squareup.com/register/hardware/) - GoPago is beautiful and crisp, but Square does a better job getting instant engagement (free card reader or "Shop Now" / just leave email offer on LP etc).

Since the start one of Square's major advantages is their deceptively simple user interface - their conversion rate of getting interested merchant's email / info is likely many multiples over competitor's contact rate.

Unsolicited free advice is worth what you paid for it, but feel free to drop me a line via my profile if you'd like some actionable recommendations for closing that gap . . .