I ran into the same problem. I started a pet project that involved scraping reddit (though for a different purpose than AMAs). Their robots.txt and an admin writeup from somewhere on their site made me realize that I'd probably just have to take it down and/or my scraper would just get blacklisted. It's a bummer because there's 1001 great ideas out there for filtering, categorizing, and viewing reddit's data in different ways. And it seems like they encourage 3rd party interaction to some extent with their API and all, yet scraping is kind of needed in most cases.

I do like the format for sure. The only thing I would consider is maybe nesting the Q/A divs (.qitem) for threads because a lot of times the Q/A content is contextual to past Q/As. You already order them that way and that helps a lot but on one of the ones I was reading it got confusing on whether they were speaking in the context of a thread or if it was a fresh Q/A. Maybe set it as a view option to toggle or something (maybe have it be a carousel where each frame contains all the Q/A divs in a thread starting with the root level, and keep it displayed flat like they are now).