The prices charged by outfits like Singita are a total rip-off, aimed at people who don't really care about wildlife. The word for it is Spafari. You pay around $1000 per person per day and then some people from tipping zones (ie, the USA) wonder about tipping a driver $10. That makes no sense at all. In my view, tipping only applies to countries with outdated employment laws (ie, the USA) or to developing world places like Burma or . . . .well, what about Mali? The Singita business prides itself on all that sustainability/community nonsense so one assumes they pay their staff adequately. I wouldn't even think about tipping anyone there.
Americans have exported a lot of good things around the world. Their degrading tipping culture isn't one of them.