Which is basically anyone for Visa/MC, and even some people for Amex. Once you're reliably processing $20k/mo, your options for merchant accounts expand a fair bit.
I think what this does is retain existing Square merchants a bit longer -- ones who grew from $0 to $8k or so, are now evaluating real merchant accounts. Inertia, other advantages of Square (PWS), etc. might keep those merchants another year or two, getting them up to around $20k/mo revenue, and then Square might come out with something new for them (a Square-specific payment instrument? Pre-loaded cards using ACH per merchant or across Square with 0% fee?)
I think what this does is retain existing Square merchants a bit longer -- ones who grew from $0 to $8k or so, are now evaluating real merchant accounts. Inertia, other advantages of Square (PWS), etc. might keep those merchants another year or two, getting them up to around $20k/mo revenue, and then Square might come out with something new for them (a Square-specific payment instrument? Pre-loaded cards using ACH per merchant or across Square with 0% fee?)