different between unsubscribe vs unsubscriber

English

Etymology

un- +? subscribe

Pronunciation

• Rhymes: -a?b

Verb

unsubscribe (third-person singular simple present unsubscribes, present participle unsubscribing, simple past and past participle unsubscribed)

1. (intransitive) To cancel a subscription, especially to an online service.

   How do I unsubscribe from your mailing list?

Translations

Noun

unsubscribe (plural unsubscribes)

1. An unsubscription.
   • 2005, Eric T. Peterson, Web Site Measurement Hacks

     Given how easy it is to filter messages or simply delete them, unsubscribes are significant events. Taken together, these metrics can tell you a lot about the quality of the email you're sending and provide the basis for testing your customer lists […]

English

Etymology

unsubscribe +? -er

Noun

unsubscriber (plural unsubscribers)

1. One who unsubscribes.
   • 2010, Beth Kanter, Allison Fine, Randi Zuckerberg, The Networked Nonprofit: Connecting with Social Media to Drive Change (page 127)

     It is also important to find out why readers unsubscribe from the blog. If the organization has the unsubscriber's e-mail address, it should send a follow-up email and a minisurvey asking why the person chose to unsubscribe.