Pick the number of orders you send in a month. That is the only decision. Every plan includes everything Tacey does, and the price never changes because you turned a feature on.
Your month starts when you subscribed, not on the 1st. It rolls forward on its own.
Shopify never moves you up a plan on its own, and neither do we. Going over costs you address checking, not money you did not agree to.
All six. Every row.
Same rows on Starter as on High Volume. Every one of them, on every plan.