For what it's worth, reddit's RSS feeds are pretty broken in my experience. It's highly likely they had to write some custom code for that as well.
Correct, Reddit RSS are not reliable, but most importantly, the rate limit always banned us in couple days every month. There are some tools available, but they will run into this issue eventually when they'll hit critical mass of users.
Reddit has RSS. Here is an example - http://old.reddit.com/r/all.rss . To subscribe to it, you need to pay 12 dollars per month to Feedly. And this I think is scammy.