Also, they are putting their money on the line by running a node and using that as the source of truth for their Bitcoin transactions.
Bitcoiners run nodes for selfish reasons to protect their sovereignty. using nodes as a measure of support is not a great method. Right now 29 is the majority of nodes followed closely by 30.2, and then knots. My guess is that the majority of 29 and under releases will migrate to 30. I haven’t upgraded to 30, because I’m lazy and historically I don’t update my node right away. If I was a militant knots user I would have moved over to that software at the earliest point I could.