There's no any African survey sites paying Africans at the moment, most survey sites are for first world countries and their citizens, ideally, survey is done to understand how consumers consume a particular product, it's a study that a company carries out to understand how consumers relate with their products, so that they'll make changes to the product and make it more appealing to the public.
Here in Africa, most companies don't care about consumer's right or how their own products are perceived as long as people are buying they're good to go, that's why there isn't any website yet that pays you to review or survey a product here in Africa.
But I strongly feel like there should be one, even if they're not paying much, it will pioneer the birth of consumer right in our beloved continent.