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Rated 1 out of 5 stars
Before you use this add-on, you should search in Google with this keyword [ "Instaright User" site:instaright.com ]. There are a lot of e-mail address used for Instapaper account.
Thanks for reaching out. Due to design bug those emails appear in SERP. It has been fixed. Google will need some time to remove those indexed pages. Sorry for inconvenience.