Casino may be the biggest player in Africa’s gambling market, but the explosion of mobile users is making the region one of the most attractive markets today.

South Africa, for example, saw its sports and horserace betting markets grow 28.5 percent to R4.4 billion in 2015, according to PricewaterhouseCoopers. Sports betting revenue has quintupled in the past five years, rising to 54% of total betting revenue in 2015 from just 22% in 2011, and PwC expects sports’ share to hit two-thirds by 2020.

PwC expects sports betting, the only legally permissible form of online gambling in the country, will see a 10.7% compound annual growth over the next five years, putting its 2020 revenue projection at R7.4 billion.

And this is where mobile comes in.