A few issues with these types of stats:
1. How do they classify SA traffic (SA visitors worldwide or only SA sites?, personally I suspect the latter.)
2. Is the information based on unique visitors or page loads? For example: if this was based on only 300 unique visitors / devices, you naturally would choose to ignore it.
3. If we are to assume this is based on SA sites, then how many of SA sites actually employ statscounter?
4. ...
I could go on, but as others have said this type of report is completely meaningless without more supporting information, something which the statscounter website does not seem to make available.
It's really a pity Mybb doesn't take more time to research these articles.