What happens if I publish a paid signup before connecting Stripe?

You cannot publish it yet. A signup with paid spots stays a draft until Stripe is connected. The signup page says This sheet has paid spots. Connect Stripe so families can pay you, then publish.

1. Click Connect Stripe on the signup page. It takes you to Settings, then Billing.
2. Finish Stripe's form.
3. Open the signup again and click Publish.

Signups with only free spots publish as usual. See How do I set up Stripe payments?