They could literally give incentives for PTR testing, or even just basic feedback and interactions with the testers. The major reason they have few PTR testers (in my experience it’s ~100’ish people generally) is because they foster 0 community for it. Their total lack of involvement in a lot of these matters (for testers at large anyways) is absolutely abysmal.
I know you want to believe they have a magic wand, and can wave it to magically make a community, but guess what, no, they don’t. That’s not how communities are made.
With SC:R they literally just had to up-res the game, and nothing else. That’s exactly what the community asked for.
Asking for community involvement is not forsaking human decency, nor counter to common sense.
You need to stop belittling people on the forums for their discontent, and start being a positive force on the forums instead.