That's not necesarily true. Is more like especulation, and also is not only marketing but business development.
You forget to acknowledge also that DASH is very different to Ethereum, DASH present a bigger risk for all these busineses that rely on CASH, like banks. Ethereum actually plays for the banks with their whole smart contract solutions, is a blockchain technology solution, thats why a lot of the corporations like to talk about blockchain but not about Bitcoin. Well DASH is the Bitcoin part of the equation while Ethereum is the blockchain part.
So is improbable that DASH will get as much party support from big players just by pouring more marketing money.