Everyone should remember that this compulsory monthly article is bull****! It is not South Africa's biggest websites, it is only Effective Measure's members biggest websites.
Effective Measures does not measure all website traffic, but only paying members. Paying members, such as MyBB are forced to use their tracking code and promote the brand, so that is why we see these articles every month.
Also, Effective Measure does not measure 0.001% of all websites in South Africa, so their stats cannot be seen representing South Africa at all.
I know this is not accurate, but if you want to get a better understanding of Internet stats in South Africa, go to Alexa.com. They use different measures, which are not accurate, but at least 90% more accurate than that of Effective Measures.