This resulted in great success in the sense that we now have a working driver for several RTS card readers, albeit with some limitations in respect of performance or supported hardware models.
The driver is available off Cholonam's Github repo.
Discussion on this new driver is available in continuation of Sinetek's original topic at insanelymac.
We've also reported on development progress of this kext in this thread where we invite owners of Hackintosh laptops fitted with Realtek RTS card readers to feedback their own test results.
Credits and thanks to Cholonam and Sinetek of course! 👍