"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.
