Patrick McHardy and copyright profiteering (Opensource.com)

Actually, there is still a ton of Busybox usage in embedded products that are produced today. I have been quietly enforcing the license of late, in compliance with SFC's guidelines.

You can not kill either Busybox usage nor (obviously) Linux usage through enforcement of the license. The programs are too desirable for other reasons, and the alternatives available fall short. All you can do through enforcement is get people to perform due diligence, or if you are a bad actor, you can collect some money until people wise up.