I recently saw a lot of threads about this but never really looked through. Finally after seeing your post, i went through their website and whitepapers. The whole idea of accountable collaboration looked new and complicated to me. But it is really well explained on YouTube by the team and well written blog posts tool! Freelancers like myself can really make use of this technology.
Looking at their work, I feel the team is putting quality time on this project and are worth investing on!!