Is Facebook Still A Good Marketing Tool. By 2020, more people will have mobile phones than running water or electricity at home. 11.5 million users in Australia – approx. 40% of Australia's population is on Facebook. 244 million people in the US, 307 million in Europe and 45 million in the UK so an approximate total of 2.5 Billion active monthly Facebook users worldwide. Is Facebook Still A Good Marketing Tool - absolutely. Listen to episode 58 of Small Business Talk to here the complete discussion on the pros and cons of using Facebook for Small Business.