Just before I start, I've read everything you've put up, but I never reviewed and I don't have a valid excuse for that... Sorry hon!
Anyways, I feel like part of it is a personality thing. You've said some things that I know people on here don't agree with, so that could be part of it. I know that there's a few authors that I ignore simply because I don't like their personality (thats probably a really shallow and unfair thing to do, but I know I'd personally rather not support someone I have an issue with). It could be that.
Or, like me and my brother, you have people who are invisible or silent readers. I know I don't like giving feedback on things because it feels so... Awkward, and sometimes I feel like I'm being fake when I give feedback on things like writing, because I seem way too happy and sometimes I make it sound like its the beat thing I've ever read even if I think its just something decent.
If you want me to actually leave feedback on your stuff, I can.
Also, this is probably the longest review I've ever written.