98% of the time people don't click on ads, but that 2% of the time when they do has made Google into a 400 billion dollar company.
I see similar ads for B!Games in the UK on my mobile at 2.50 GBP per week (approx. 4.50-5.00 AUD)
They even use the same fruit ninja style graphic.e
The business model works in the UK.
I think it is very safe to extrapolate the Australian results for the UK market by a factor of 2-3 (population is 64m).