2. $0.50 a day is WAY too expensive.
3. Is your goal to be a curator or a creator? This seems like you want to be a curator, but what makes you so sure that your newsletter is going to be so much better than my hand-picked group of people on Twitter that I would pay $15/month for it? That is more expensive than Netflix, Rdio, Pandora, Dropbox, etc. not to mention free curation services like Flipboard, news.me (recently made free), etc.
4. What I found - people don't want to pay for content. Period. I had, over the course of 6 months, around 100 people subscribe to my paid letter.ly newsletter ($2/month, btw), while around 30,000 people visit my blog. It made me realize that it's more important to have an audience than it is to have some short-term cash. That said, I am not sure if the same necessarily applies to curators.
5. IMO, the rewards are much better if you are "known" as a curator vs. "paid" to be a curator.
Best of luck, though. Interested to see what happens!
Background: I had a paid email newsletter through the service letter.ly for around 6 months from July-December 2010. I have also had an on-and-off blog since March 2009.