No, I don't think so. For example, they have a feature that allows to follow a some twitter feed. Twitter does not have RSS feeds, so they wrote a code to handle that and charging money for that. I'm totally fine with that.
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.