Are all these summaries going to be hand-written?
Who will be writing them, how many people would you have on backup in case you can't write the summaries for that day? -- Since, you know, people would be paying for the service.
With the Hacker Newsletter, if I don't get it sometimes, I don't really care, since it's free. However, if I were paying for a service I might feel different about it.
I wouldn't mind trying it, but I don't think I'd pay for it. But, who knows, others might! Good luck to you.