It's simply the wrong tool for the job. Switch to Port instead and create dynamic Buy Tickets buttons you can copy and paste anywhere on the web. It's a better way to sell and redeem.
PayPal is a simple payment processor, not a tool that's built to be used for admission. Port, however, is both of those things. And it's built to be flexible so it can be used in a lot of ways.
Buyers who visit your website from Safari for iOS, or visit a Port checkout page directly in Safari for macOS Sierra will now have the option to pay with Apple Pay right from the browser. It's a really fast way to collect payment, name, and email address all by the touch of a finger.
Port is more than just a buy button. Each product sold results in an access code. Checking people in through that code or by name lookup is quick and easy.
Port's fee is only 2 more cents than PayPal's when selling a $20 ticket, but it's a tool that makes way more sense when selling admission.