Aren’t the coin check hackers funds tainted?

Hey there! So I’ve been heard from many sources that no exchanges will accept the hackers nem as it has been tainted with a mosaic.

However, many news sites have found that about 40% of this nem has already been laundered through the dark net.

My question is why are people buying so much nem from the hackers if they will not be able to use it? Or are the buyers getting around the mosaic somehow? If so this is especially worrying.

Any thoughts or comments are appreciated.