The company (Adjoint, Inc) is described as "digitises cash and settlement processes", something that cryptocurrencies aim to do as well. His company clearly doesn't use decentralization (since why would he make a post against it?), which cryptocurrencies do. How is that not a conflict of interest in this specific blogpost?

Reading the post it seems like he has no stake in the outcome of what people think about cryptocurrencies and decentralization, but that's not true, as a founder he has a huge stake in the outcome.