The Feedly RSS Reader for Chrome should not be trusted. Since they are cheating to get signups, it’s impossible to say what other bad things they are doing behind the scenes with your data.
The face of spam keeps changing. It used to be email, then blog comments, now it’s comment stuffing (as in “ballot stuffing”). Look at this screenshot and tell me what you think looks fishy:
Let me give you a hint, the exact same comment was repeated word-for-word by over 40 different people in the review section of this Chrome Extension.
I know it’s a near impossible task, but you should always be on the lookout for fake people (AKA Sockpuppets) recommending products. I reported this incident to Google but it’s happened a lot before and it will happen a lot in the future.