Out of curiosity, why would you expect to know whether a given developer was using your technology using the criteria you list?
As an example, I've been using Microsoft technology for the better part of 20 years now, and I've never sent them an email. I'm sure there are chat rooms for their stuff, but honestly I can't come up with a reason why any grownup would ever enter one.
My suspicion is that the developers you see on the support forums are not the best ones. The ones that simply get it immediately and start running are the ones you'll never hear from.
As an example, I've been using Microsoft technology for the better part of 20 years now, and I've never sent them an email. I'm sure there are chat rooms for their stuff, but honestly I can't come up with a reason why any grownup would ever enter one.
My suspicion is that the developers you see on the support forums are not the best ones. The ones that simply get it immediately and start running are the ones you'll never hear from.