I think we should be selling Steem primarily on the freedom to post what you want and the fact there is very little advertising. Throw in some top quality contributers and its a great place to hang and 'do social media'. I'd personally push the combination social media/blogging/community ticket and let people find out the multitude of ways they can use Steem based on their own personal preferences.

Steem - Rewarding Social Media done the way you choose without giving up your soul

Its tough to be concise!!
Rewarding suggests its satisfying and not just fiscally rewarding I think.