We're available throughout Africa through Atlas, and are happily serving customers in many African countries, including South Africa. (The community in Cape Town is huge!)

We want to be able to support entrepreneurs and businesses substantially everywhere. We don't talk about concrete timelines externally until we have something ready to show, because that is pure downside for our users if e.g. priorities change, a country launch gets delayed due to issues beyond our control, etc.

When we have plans for infrastructure that we can roll out in a fashion which is predictable enough to be viable to build a business on top of, you'll hear about it in all the usual places. Until then, https://stripe.com/global#za and Atlas are your best options.