We do not need those companies to give credence to what the developers are doing, their blockchains are going to serve them only to themselves and we will be unable to see what they do with it and it is likely that anything they discover they will keep it private or they will try to get patents over their discoveries, so whatever they are doing that does not benefit us in any way.
You're right, MasterCard is trying to develop personal blockchain technology and even patent technology that is actually free to use and develop. But now I have not seen the development of the blockchain technology that they are using, whether it is effective or even a part of the centralization of the latest models.