I'm not sure what's hard to get exactly. How would you like it if Google forced you to sign in to search and then one day told the whole world what you were searching for? Yes they backtracked on the latter but it's fucking ridiculous that it would have even went live in the first place. It makes me never want to sign in to Quora again. And since you can't even browse the site effectively without signing in, the whole thing is useless.
The fact that they have to monetize hurts their user experience because they push features such as requiring you to sign to view answers.
As long as Quaora continues to hide content, in long term, there is no way but bankruptcy.
Which opened the field wide for StackOverflow to come in and succeed.
Is there any reason why a similar replacement for Quora can't take off?