Selling slot capacities under control
For ticket sales, the capacity logic decides on success and frustration. You must prevent more tickets being sold than seats available — especially with sought-after events, hundreds of buyers can sign up in seconds. Therefore define a hard upper limit per category and reserve seats atomically during the checkout process. Stripe itself does not offer inventory management; that lies in your backend responsibility.
For small to medium events, a simple mechanism suffices: on clicking "Buy", the seat is reserved for 10 minutes, during which the buyer must complete the Stripe checkout. If nothing arrives in that time, the seat falls back into the pool. For large events with a run on the sales start, queues are worthwhile — such as a virtual queue that serves buyers in the order of their arrival. Show the remaining capacity live ("12 tickets remaining"). This transparency increases conversion and avoids frustration from sold-out categories at the checkout click.