I love the idea, but I don't know why your poll didn't include a $0 option. Personally, I would prefer to simply "be interested" in an ad or two on your site every once in a while if I enjoy the service. I think you need to show people that your digested articles are worth >= $3 per month before you start charging. Get some dedicated readers who really value the service by doing it for free/with ads at first, then change to a subscription-based service. Maybe even offer a short "early adopter" program where those who sign up early can read for free after you start charging. Just my opinion.