Because they're not interested in that market (Score 1)

It's a nobrainer to offer this to SA market,
because that market is negligible
compared to US for instance.

Maybe he doesn't know that a fraction of
a percent of SA schools have computers
for students -- I'll give him the benefit
of the doubt on that.

But all South African schools with computers
will be using Linux, WordPerfect, etcetera,
in the future anyway, with so many
Linux advocates/professionals in South Africa
carrying the flag :-)