I just got back from a few months in China. These services are definitely blocked through DPI. It's frustrating. It's also interesting what happens to your mind when you can't read what you'd like to, talk about what you'd like to, and revert the accepted status quo for everything.
"Do people in China in general care enough about censorship to pay for access to uncensored internet?" doesn't have an explicitly obvious answer, does it?
They could be happy with their internet as is. They could be unhappy and willing to pay. They could be unhappy but unwilling/unable to pay.
I think there's a parallel here with how the FCC tries to censor certain words and images, but you can pay a premium to get them via non-public, historically illegal [1], means.
