Here's the link to the present (& only) GPL release:http://www.acryan.com/downloads/RTD1073_GPL.zip
Technically each firmware release is supposed to be accompanied by a fresh release of the GPL source code, along with modifications to said code to make it work with the device.
As you're now drawing on the realtek sdk 3, things are bound to have changed.
For example the /lib/modules/184.108.40.206-VENUS/source symlink on the ACR-PV73100/Firmware_PV73100_v7.06.r1402 firmware shows:
whereas the latest beta (Firmware_PV73100_v7.3.4.r4090_European) /lib/modules/220.127.116.11-VENUS/source symlink shows:
Note the V2.
As these devices evolve and the underlying source code gets modified from release to release, it's important to meet the GPL requirements, again.
I appreciate hearing from ACRyan on this matter.
- a place for open discussion of modifications to embedded linux devices