There are 886k South Africans living abroad, according to all sources listed in Wikipedia.
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About 1.5% of the SA population or 70% of Gqerberha’s (PE) population.

53% of those emigrants live in the UK and Australia (467k people), the size of a medium to large city in South Africa—but with significantly higher average disposable income than some of our largest cities (and a favourable exchange rate).

And guess who knows this... Checkers (The Shoprite Group of Companies)

“𝘊𝘩𝘦𝘤𝘬𝘦𝘳𝘴 𝘱𝘭𝘢𝘤𝘦𝘥 𝘢𝘥𝘴 𝘪𝘯 𝘜𝘒 𝘢𝘯𝘥 𝘈𝘶𝘴𝘵𝘳𝘢𝘭𝘪𝘢𝘯 𝘯𝘦𝘸𝘴𝘱𝘢𝘱𝘦𝘳𝘴, 𝘤𝘰𝘮𝘱𝘢𝘳𝘪𝘯𝘨 𝘵𝘩𝘦 𝘱𝘳𝘪𝘤𝘦𝘴 𝘰𝘧 𝘭𝘰𝘤𝘢𝘭 𝘳𝘦𝘵𝘢𝘪𝘭𝘦𝘳𝘴 𝘵𝘰 𝘵𝘩𝘰𝘴𝘦 𝘰𝘧 𝘊𝘩𝘦𝘤𝘬𝘦𝘳𝘴.𝘕𝘰 𝘥𝘰𝘶𝘣𝘵, 𝘊𝘩𝘦𝘤𝘬𝘦𝘳𝘴 𝘩𝘢𝘴 𝘣𝘦𝘦𝘯 𝘮𝘰𝘯𝘪𝘵𝘰𝘳𝘪𝘯𝘨 𝘸𝘩𝘦𝘳𝘦 𝘵𝘩𝘦𝘪𝘳 𝘚𝘪𝘹𝘵𝘺60 𝘰𝘳𝘥𝘦𝘳𝘴 𝘢𝘳𝘦 𝘤𝘰𝘮𝘪𝘯𝘨 𝘧𝘳𝘰𝘮. 𝘛𝘩𝘦𝘺 𝘯𝘰𝘵𝘪𝘤𝘦𝘥 𝘢 𝘧𝘢𝘪𝘳 𝘤𝘩𝘶𝘯𝘬 𝘢𝘳𝘦 𝘧𝘳𝘰𝘮 𝘰𝘷𝘦𝘳𝘴𝘦𝘢𝘴 𝘢𝘯𝘥 𝘢𝘳𝘦 𝘭𝘪𝘬𝘦𝘭𝘺 𝘤𝘰𝘯𝘴𝘪𝘥𝘦𝘳𝘪𝘯𝘨 𝘵𝘩𝘦𝘴𝘦 𝘦𝘹𝘱𝘢𝘵𝘴 𝘪𝘯 𝘵𝘩𝘰𝘴𝘦 𝘤𝘰𝘶𝘯𝘵𝘳𝘪𝘦𝘴 𝘢𝘴 𝘴𝘦𝘳𝘪𝘰𝘶𝘴 𝘤𝘶𝘴𝘵𝘰𝘮𝘦𝘳𝘴 𝘣𝘶𝘺𝘪𝘯𝘨 𝘨𝘳𝘰𝘤𝘦𝘳𝘪𝘦𝘴 𝘧𝘰𝘳 𝘱𝘦𝘰𝘱𝘭𝘦 𝘣𝘢𝘤𝘬 𝘪𝘯 𝘚𝘈.” An extract from The Open Letter newsletter.

A pretty clever way to get attention, I'd say!