She's great.
She should go pro now, and have the money put into a trust. Sign a 2-year deal, renewable, with performance bonuses and escalation. That way she would at least make some $, and also have an opportunity to make bigger $ when she hits her prime.
Would anybody sign her right now? I would. She seems like the real deal, and she's young enough to be totally absorbed by running track. Plus, she's young enough to appeal to an entirely new audience, and it is that audience that (I think) tends to spend money on endorsed products.
There are very few things I would like to see more than Mu destroying that Semenya guy--but remember Semenya IS a guy, and is likely faster than he has yet run. We will see what the new T ruling means to him, but Mu's endless legs, the infinite stride, combined with the desire... Give her some turnover and...excellent.