The Hundred will be a separate TV deal the next time round due to the private owners. There's also rumours the ECB want to unbundle the domestic game from international rights. That will have huge financial implications for the non test ground counties and will more than likely leave The Hundred the only form of domestic coverage.
At the same time in the week the BBC reported their country championship coverage live page got 27.8 million page views this summer, an average of nearly half a million a day, the ECB are considering offering the rights to commercial broadcaster. The idea that any commercial broadcaster will provide anywhere close to the same level of coverage is laughable.