+1 it’s reasonable for RH to not devote resources to debranding stuff and to get paid for the effort of packaging and maintaining their distribution. However threatening to retaliate for exercising GPL rights just downright scummy and violates the spirit of GPL even if they might not violate the license technically…
I’ve always used i3lock. I also made a script to randomly select a background. Plus the login password circle thing looks cool. Would definitely recommend.