Yes, I would pay $1 - $3 per year, max.
Yes, I would pay about $4 - $6 per year.
Yes, I would pay up to $10 per year as long as the newsletter keeps getting better.
Yes, I would pay up to $20 per year as long as it improves and becomes the best newsletter for front-end developers.
No, but I'd be fine with 2-3 dev-related ad spots, which should be clearly marked.
No, I want this for free, with no ads, but I don't mind some self-promotion (e.g. selling dev-related e-books) to pay the bills.