I still don't know a lot about it, but I signed up, thanks mostly to the education and outreach of @taskmaster4450.  Manna is advocating for a cryptocurrency of universal basic income (UBI) for all.  If just 10% of Steemians sign-up, it would be a huge boost.  

http://www.grantcoin.org/wp-content/uploads/manna-banner-new.jpg

@scottsantens has also been a big advocate and educator on UBI here on Steemit.

... i also just noticed a new steem account for @mannacurrency as well 

If you sign-up you can use my referral link, it gives you a bonus as well as myself:

https://www.mannabase.com/?ref=8a47a6b84e

sign-up today and check it out

peace  @clumsysilverdad