Hasbro know through their gross margin lines the type of conditions their subcontracted labour force works under. They just choose like so many others to ignore it & hope it will go away. As for their "investigation" the only thing they will investigate is how to minimise the global impact on their products due to the negative publicity. I am not saying Hasbro are any different or worse than the other global corporations who profit from others misery. It is what it is unfortunately.
Are Hasbro signatories to some form of global fair trade/sustainability agreement? Not sure what it is called but I do quite a bit with PEFC & FSC certified products & the companies that have those certifications pay a huge premium to do so & are regularly audited to ensure they comply on all levels globally. It is the same deal with Rainforest Alliance & Fair Trade coffee/tea manufacturers.