Congrats! Awesome to see some others from the newsletter world here. I'm a bit earlier than you are along the process, I have a crypto based newsletter which has about 1200 subscribers, ~50 editions sent, and just started conversations with interested sponsors (we also had inbounds which we have not really engaged with). Our SEO is doing pretty well, we get roughly 3500 people coming to the site per month, and when something in crypto world blows up we double that.
I have 2 tactical questions for you:
1. That seems like a relatively high CPM for your niche, how did you structure your sponsorships to get there? To be more specific, what are the normal sponsorship lengths, do you do a short term and then renegotiate after they've seen click throughs, does click through come into play in your negotiations, etc.
2. Your open rate is amazing. We used to maintain an open rate in the 40%'s, but we saw a dropoff and have been struggling to get from mid 20s back to mid 40s for a while now. I know this is because we end up in promotions, but can't quite arcane how to get out of those folders. Did you do anything in particular to maintain your open rate?