InGo offers its clients a "Social Email Only" option that utilizes our technology to incentivize your potential registrants to log-in socially and advocate for your event.
Assuming that the email platform can URL-encode a link, all that you would need to do to allow users to also authorize a social network would be turn the user-specific link
http://platform.domain/u?id=returningUserId into the social auth link
https://ingo.me/{social-network}/auth?nextUrl=http://platform.domain/u%3Fid=returningUserId and things would
just work.
The email's layout could be as simple as the following sample:
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