They keep adding new coaches, so obviously they can't be doing too badly.
$30/monthhow much do these training sites cost to join?
This.
I can't imagine business has gone down too much. The type of people who pay money for training will typically still be playing now, whether on Carbon or live or some other way. You'll notice that not many CCers have suddenly disappeared and stopped playing, and I would say you can extrapolate this to the wider poker playing nation, not too many will have stopped.