I opened AdobeRGB1998.icc in ColorThink Pro and it reports XYZ: 0.010, 0.010, 0.011 for the wtpt tag ?
In ColorThink 2.1.2 the XYZ values are: 0.9504547, 1, 108905.
I also checked the profile with ICC Profile Inspector which reports: 0.95045, 1, 1.08905.
Another question. Why doesn’t ColorThink report the content of the ‘chad’ tag (Chromatic Adaptation)? Judging from ICC Profile Inspector it’s a 3 x 3 matrix used to adjust for a reference white other than D50.