Bitcointalk: The Reddit for Cryptocurrencies (#coinlist article)

Hashtag Invite Enabled: Share your post and invite a new user to this ECO Group by creating a "hash-tag" invite. Simply include a hash-tag immediately before an email address (For example: #janedoe@example.com) and the owner of that email address will receive a copy of your post and an invitation to join the group. The email address will not display in the posting (For example: #Janedoe@example.com would show merely as "j…@...com")