There’s only one left, all the others went bankrupt, and that one (FlixBus) only offers long-distance journeys, while this ticket only applies to regional trains.
Secondly, the 9€-Ticket is valid in all of Germany, so you could travel the length and width of the country if you wanted to. You'd just have to change trains a lot.
Apart from the fact that I'm opposed for principled reasons. If we want to make people's life easier, we should cut down on taxes, not engage in more deficit spending. Especially as the economy is headed for hard times anyway, for exactly that kind of reasons.
The bus companies which operate official lines for Verkehrsverbünde will get paid the same as always, they’re not affected by the 9-Euro-Ticket.
However, I fail to see how that business, which usually involves a time constraint and direct point-to-point travels, would be impacted by this kind of ticket.