Switch to Free without emailing anyone
There is now a Switch to Free control on the billing page.
Signing up took about a minute. Leaving used to take an email and a wait. That asymmetry is a design choice wherever it appears, and it is not one we want to have made, so: it is a button, it sits on the billing page next to the controls that got you here, and it asks for confirmation once because it changes what you are paying for.
Your data does not go anywhere. You keep your boards. What changes is the plan's limits and cadences — Free syncs from your provider every 15 minutes rather than every 5, and drops the webhook. Manual Sync now and the per-card refresh keep working exactly as before; those are not plan-gated on any tier.