If someone has given you a public Prezi link and you do not want to sign up for a trial, you can use open-source scripts that bypass the export paywall by scraping the presentation frames into a static file.
From your dashboard, click the three dots (⋮) on your presentation thumbnail. download prezi presentation from link free
: Go to the Prezi pricing page and select a plan that offers a 7-day free trial (like the "Plus" or "Premium" plans). If someone has given you a public Prezi