None of these are banned. They simply choose to not operate in China, because the laws require them hand over user data. So they choose to monopolize those data themselves, which is allowed in US and so called "free" nations. Go figure how ridiculous that is.
Yes, some of those are banned. Banned means to prohibit, especially by legal means. These websites are not reachable from mainland China, so they are banned in mainland China.
Their operation wasn't suspended for a compliance reason. This article lists some of those, and their (suspected) reason for the ban:
