Did they put a gun to their heads to get into the agreement? Why are carrefour dominant? We've had the likes of uchumi, nakumatt, tuskys what happened to those? Why didn't the suppliers go with alternatives?
If carrefour artificially bullied other outlets to get their so called dominant position, now that would have been a course for concern.
In a free market, the best solution wins. Even a smart kid would get that. I'm not even a great fan of carrefour given some substandard goods I've bought there