Linkedin is an online social network, targeting the business sector. They offer companies the chance to advertise on their platform. They use this Free trial email sequence to promote and sell their software product toolset: Sponsored Content.
Linkdin kicks off with an ad that offers you a free trial. Followed by an Ad landingpage, in case you decided to give it a try. If you wait too long, Linkedin will send you some emails asking you to activate your trial code. They'll use urgency to persuade potential customers by setting a deadline for activating the trial. Besides that they'll try to convince the subscribers by emphasizing the benefits of Sponsored Content.
You can read more about Linkedin here: https://linkedin.com/