> making a reasonable request (how do you plan to support SAM460ex when RadeonHD
> is its default card beyond integrated 2D) is needed. I am also willing to donate towards
> its goal, which is not my personal benefit, but of all high end G5 Macs and SAM460ex

Drivers for Radeon HD cards won't benefit G5 Macs, as you were told already:

https://morph.zone/modules/newbb_plus/viewtopic.php?forum=11&topic_id=1215&start=94