All good points. If the install market for these is fast-casual restaurants, it's probably not unreasonable to cap them at something like $20 per transaction. W

All good points. If the install market for these is fast-casual restaurants, it's probably not unreasonable to cap them at something like $20 per transaction. While the cards should be reloadable, they could probably also have limits for both carried balance and reload frequency, and the presence of human staff at restaurants should also deter money-laundering activity.