Who funds the ACS?

I've been following the progress of the Autonomous Crypto System (ACS) project, and I'm quite intrigued by its potential to revolutionize cryptocurrency transactions. However, one aspect that remains unclear to me is the question of funding. Who, or what entities, are responsible for funding the development and maintenance of the ACS? Is it solely reliant on grants and donations, or does it have a more sustainable funding model? I'm particularly interested in understanding the financial backbone that enables such an ambitious and groundbreaking project to come to fruition.