I have yet to find one report of them working.. links please.
If they didn't work then Thomas would have told me. It would be a really big deal. That is my view.
The way I remember it is that Thomas plugged one into his 060 card and it worked and it did not have MMU or FPU.
You could try datamining the Natami forum.
The only thing I could find that went into any detail was the thread on MorphOS zone or whatever it was called.. and no one there could provide/find an example of one of these things working either. You're also assuming that all of these chips that are floating around the Chinese brokers are the same thing.
Supposedly some Atari guys are using them. You could search Atari forums if u want.
Of if they are really $20.00 why not just buy one and see what happens?