I can see that TAU mobile mining has already been established since 2 years ago. I was a  miner of that coin. The current tech is focused however in decentralized web 3 model, initially at messaging. It would literally mean no restriction from posting or joining groups. Mobile mining tech does not rely on POW or POS obviously as what most of the comments here seem to know. It is far beyond the likes of electroneum or even Pi. Those are all simulated mining, which as we all know, is not real mining. TAU mobile mining concept derives from having no central servers ( such as facebook, twitter, telegram etc.) while utilizing the least possible data consumption on a daily basis. And yes it is a hard code to make since there is literally NONE to copy from. Blockchain nowadays are focused on speed of transactions while neglecting decentralization and security.

How decentralized can TAU get? The groups you create on app are totally controllable only by you. Even the team cannot control them. People cannot be removed from the group and messages cannot be deleted ( as they are hashed on chain ) If  you think at it, it is actually a great way to hide messages and have a discreet communication.

So far, this is what I understood about the project and tech. I do not understand codes nor have any skills so you are free to check on their codes since they are public and open-source anyway. If I would put it in line with bitcoin and other cryptocurrencies, it should be as follows:

Bitcoin - Proof of Work - Digital gold - Finance
Eth - Proof of Stake - Smart contract -
TAU - Proof of Transaction - Communication