I cited piracy as it was the main purpose of the censor (supposedly); whether that ends up being its actual use or not.
Can't comment on A, seeing as my only experience with Australian internet speeds is mocking my Australian friends' internet speed.
Internet censorship is a case of whack-a-mole. Block a server? They move the server. Seize a domain? Users can edit their host files (or get a new domain). Block an IP address or IP range? People will set up mirrors. The average person (and for that matter, politician) are seemingly unaware of this and waste a lot of time and money forming non-solutions. In some cases I'm actually supportive of B occurring due to the Streisand Effect. Their attempts at censoring information ends up spreading the message further and gives it a microphone and limelight in an increasing number of cases.