But the best bit re CRZ is how mobile alerts have exploded. Only introduced last year, mobile usuage has quadrupled from PCP. When a business can quadruple in size each year it is growing fast. But lets say (due to low base) growth slows by 25%. That means business only triples each year. Nevertheless, the compound effect soon adds up. 3x3x3=27. How many businesses can grow by 27x in 3 yrs? Not even BHP can match that!