Default Blinkfeed Q.

Does Blinkfeed accept RSS feeds? Does it work with any aggregator services?

Or do they simply offer you a fixed list of providers, from which you have to pick the ones you want?

I'm asking because I'm a news junkie, but not really a social networker. I don't want to see pictures from Facebook, but I would like to see articles from the blogs and publishers I read the most.

Someone will send me an HTC One for a good price, but I don't have access to it beforehand. I'm really curious about how this works. I believe it was a fixed list when the phone came out, but I always heard it would expand. Can anybody weigh in on this? Is it any better since when the phone first came out?