Since 1.6.0 "Show" both whitelisted a method for its group and hid it from
everybody else. A group shown ordinary methods next to a free one therefore
took the ordinary ones away from every stranger, who was left with only the
free method. "Only" now carries the reservation; "Show" is just the group's
whitelist. Existing show rules are converted to only once on update so the
checkout does not change until the shop chooses.
Co-Authored-By: Claude Code <[email protected]>
