I don't think that makes sense. Maybe I should clarify, that this is not at all logical. BestMixer would not benefit to having the money hidden because the fact the money exists is still public.
Would they benefit from having the location of the money as an unknown to the public?
No. The existence of the money is still known to the public. Once you disclose the existence of the money publicly, you lose the benefit of hiding its exact location. As previously stated, it would be trivial for BextMixer to later mix the money themselves once returned to them.
After all, you presume it resides with DarkStar_ now as a result of Hhampuz's loan. What if this is not the case?
Hhampuz has other bills. The money could have been used to pay for his various living expenses so that his forum earnings could be used to solely repay the loan.