The group is suggesting that its members will make some of their products unavailable to Australian users if regulations they deem unacceptable are imposed. It

The group is suggesting that its members will make some of their products unavailable to Australian users if regulations they deem unacceptable are imposed. It's plausible. Australia's population is about 25 million. Assuming 90% of the population uses Facebook, they're under 1% of Facebook's userbase. That's enough of a loss to care about, but not so much that the company couldn't consider it as an option.