The interesting thing @tony b, is that I never knew there were groundnuts in the suya rub mix. That is why I was so dismissive of your comparison with satay! I don't think the rub actually tastes of nuts. The primary flavours that I get are of ginger and hot peppers.
From my perspective, suya is delicious street food from my childhood and teens. The rub and how it was marinaded were trade secrets and your only job was to decide which stand's product was your favourite and then get there before they ran out or before an impossible queue built up. The good news for me is that my Dad has brought me what looks like a year's supply of rub from my favourite stand. They do a particular cross grain cut on the meat that makes it easy to eat and the cook makes the thin(ish) slices really juicy and never dry. I have to figure that all out. May then move on to trying out rub recipes online to see if any are better than the one that I love.