Quite a few ways to skirt the GPL....Also depends what version of the GPL...and it may not be a GPL license at all but a similar license
Binary blobs for device drivers for instance.. Many devices have two versions of the code... One that is fully GPL, and the other that has proprietary drivers and devices and modifications in it... That said. im hoping that Securifi will be trying/try to get an updated kernel and a bit more current OpenWRT stable release of OpenWRT, kernel, and perhaps a facelift to the web interface. Not necessarily in that order. or have a way to compile/install a current OpenWRT and perhaps some blobs, or have an newer open version without the hardware acceleration.. Even though they originally skipped Realtek.. I still think there might be a bit of obligation on Realteks hands as a customer... And for the most part, Realteks tends to be a bit more open source friendly.... so it could actually help in someways...
Im staying tuned to see how this evolves..