Deriv is not regulated by the South African authorities. They are regulated by some less popular low-tier regulators which makes me uncomfortable to trade with them.
Malta FSA - Low tier deriv regulator
Labuan FSA - Low tier deriv regulator
Saint Vincent FSA - Low tier deriv regulator
British Virgin Islands FSC - Low tier deriv regulator
Mauritius FSC - Low tier deriv regulator
I dont see anything so special about Deriv that makes it worth the risk, their trading platforms are slow and have a lot of lag; and their spreads are not exactly the lowest.
FSCA regulated brokers are held to higher standards and can be held accountable ny the South African government. Do not risk trading with high-risk brokers who lack FSCA regulation.