That's basically the reason. CNN dumped a bunch of resources into it without really identifying what audience or demand CNN+ is trying to satisfy.
Fox news IIRC airs their shows live on Youtube, but MSNBC (eg, maddow) doesn't, so I wind up having to find some pirated stream on a janky ad-spammed site to watch the news live. Or, w/Maddow wait for her podcast to drop around midnight.
Being television I'm sure it's some contractual thing with the tv networks as to why there aren't more free/cheap/easy news streaming options. It'd be nice if there were, I think that'd get younger people much more engaged in politics. Also the fact that it's so easy to get OAN/Fox and difficult to get the other side...
https://www.axios.com/cnn-plus-discovery-zucker-zaslav-fc031...
Hard to know if it would have ultimately made any difference, but it certainly was a negative.
Math?
The math is terrible. They probably didn't even make enough money to buy even half of a house in San Fran, despite $300 million spent in questionable ways (Chris Wallace gets a $9 million contract?? He's laughing his head off all the way to the bank.)
I've seen rumors that he is livid. I think the type of personality that takes that job wants to be seen and heard - it's not just about money. He's likely plenty rich as is.