Hi! Founder of Ghost here. The way to cancel a trial is to go to the billing area in the product, then click on "Cancel" - red link at the bottom of the page.

Hi! Founder of Ghost here. The way to cancel a trial is to go to the billing area in the product, then click on "Cancel" - red link at the bottom of the page. That instantly cancels the trial and deletes the account. If you don't cancel manually, and the trial ends, then we still automatically cancel and delete anyway.