Currently, you can accept “All Members” or “Manually Approve” site members.
This is very limiting. Many business owners don’t want “open gates” where everyone can join - but they also don’t want to stop the checkout workflow because a member has to wait to be approved before they can access the product they just purchased - or can’t purchase (pricing plans, subscriptions).
There should be an option where Members are automatically approved with Purchase. Perhaps an insertion in the checkout workflow where the signup is made when applicable. Perhaps between entering payment information, and the actual collection of funds a page or lightbox can pop up with the form and say “Membership is required to complete this transaction”.