The TCM limits are 0.010.
That company has a STC to turn down to 0.020, and uses undersize bearings.
Once the crank goes beyond that, its junk.If someone was overhauling an engine, and the crank measured 0.020, they could use the STC to continue service, but why you would spend all that money on an overhaul with a crank essentially almost gone is not something I would do. That's like reusing EVERYTHING in your "overhaul" so long as it met the maximum limits.