Invitement 

An invitation utilizing two or more social media platforms such as evite.com, meetup.com, Facebook, etc.

You don't wanna put that shit down on paper, you wanna go electronic and have an invitement.

Invitement by Unique Nuyorque August 27, 2013

intement

a word used to describe the field of interactive entertainment. (e.g. video games)

The intement industry is making some fat cash.

intement by Rich Uncle Skeleton December 23, 2006