Bonitas has rebutted Best World's rebuttal (attached).
Bonitas makes sense to me. Furthermore, they put money in their mouth and declare they are shortists, publish reasons for shorting. I think its fair and they serve a useful function in the market. The amount of research and legwork they put in is beyond most investors, including institutional ones.
Dont forget, Bonitas' reputation is also at stake. They are also building a track record. If shown to be unreliable, in future nobody will give them any credibility.