Add them to nvidia and Via.
Here is the follow up article which seems to present a dim view of things from inside AMD.
Why did AMD Quit?
According to a blog written by Nigel Dessau, Senior Vice President and Chief Marketing Officer of AMD, the problem with SYSmark is, that it runs a lot of demanding workloads that don't correspond with typical usage of most users:
"While SM2012 is marketed as rating performance using 18 applications and 390 measurements, the reality is that only 7 applications and less than 10 percent of the total measurements dominate the overall score. So a small class of operations across the entire benchmark influences the overall score.
In fact, a relatively large proportion of the SM2012 score is based on system performance rated during optical character recognition (OCR) and file compression activities - things an average user will rarely if ever do.
And SM2012 doesn’t represent the evolution of computer processing and how that evolution is influencing average users’ experience. SM2012 focuses only on the serial processing performance of the CPU, and virtually ignores the parallel processing performance of the GPU. In particular, SM2012 scores do not take into account GPU-accelerated applications that are widely used in today’s business environments."
I don't know how objective bright side of the news is, but if these are legit comments from insiders, I'm a little worried.