How do plan changes work when my workspace is billed through Shopify?

When you click Upgrade or Downgrade on the Plans page, Deskhero shows a Shopify Billing Approval dialog and then redirects you to Shopify to approve the new subscription terms. A default monthly spending cap is calculated from your current number of users and pending invites, and you can raise it before proceeding to avoid re-approving the subscription each time you add a user.