I have checked off that I was willing to volunteer every year for the last 5. I buy 2 permits and choose 2 different regions so I only check off to volunteer for the one close to where I live as the other is where I grew up.
Not once has the club contacted me to ask if I was willing to help. I have had to contact them. So even for me only half my permit sales I choose to volunteer. And I know a bunch that do the same.
The club often doesn't post that they are doing work or need help and I don't hear about it until after the work is done when they post pictures on Facebook.
I want to help when I am available and not working but I'm also not going to send a message to them weekly as I also have kids and a life.