Klipfolio offers dashboard software that helps to control your business data. Klipfolio used this free trial email sequence to persuade potential customers to buy their software.
Klipfolio opens with an optin page where you can subscribe for a free trial and build your own dashboard. Followed by some instruction emails, including an invitation to a free instruction webinar. At the end they warn you for the ending of the trial period and offer you the chance to continue with the paid version.
You can read more about Klipfolio here: https://www.klipfolio.com