Interesting that Mabalam isn't being exploited.
Avima, Badondo, and Nebeba are.
Given the SDL involvement was Mbalam and Nebeba, (as per SDL provided image above), not exploiting Mbalam at this first stage could be a result of pending litigation.
With Mbalam out of the equation, the Consortium must be reasonably confident SDL does not have a strong enough case with Nebeba.