Good ideas and conversation. No ads, no tracking. Login or Take a Tour!
The ecosystem certainly rewards those who stick within it. But I've had no problems loading ePubs and PDFs in mine.
Neither have I, it's more of a feeling of dirtyness that I know I can't transport my kindle books from one ecosystem to another without decrypting the drm. It's been fine because Amazon's kindle has been the best thus far, and I have no problems with their ecosystem. But hey you never know what crazy device might come out tomorrow!