I dunno, I'm sure there's a part of them that doesn't want to scare off all the free labor they get from the community developers. They are probably legitimately trying to gauge how much of an impact on that this will have. That doesn't mean they are going to stop or change anything, but they probably genuinely care enough to know.

It's very likely that no amount of negative feedback will change anything. Why not waste some of their time anyway? Write to them, call them, spread the word. This is the only thing we can do. Even if it goes through regardless - at the very least we can make it as unpleasant as possible.

Doesnt matter.
Give feedback and pray it somehow does something!

You do it for posterity reasons