Great that they've settled on a business model, but I feel like if you are going to have a free tier that HTTPS should be part of it.
I do not think HTTPS is in any way a required feature for a feedreader. It’s pretty perfect as a premium feature.
[1] http://en.wikipedia.org/wiki/PRISM [2] http://en.wikipedia.org/wiki/XKeyscore
FWIW, I'm a big fan of Feedly, and have upgraded to Pro.