Translations:Quick start guide - LimeSurvey 3.0+/16/en
From LimeSurvey Manual
Note: You can unsubscribe at any time: (1) Sign into your account. (2) Click on your username at the top of the page and select Your LimeSurvey Profile. (3) Select Community Profile from the Profile Menu on the left side of the page. (4) Click on Mailing Lists in the middle of the page. (4) Uncheck the LimeSurvey Newsletter box.
For faster registration, LimeSurvey allows each user to sign up via their Twitter, Gmail, or GitHub account. LimeSurvey will gather the basic information required from your selected source.