Hi HN- I've been building out NewsletterRadar (<a href="https://newsletterradar.com" rel="nofollow noreferrer">https://newsletterradar.com</a>) to help companies search and get alerted to newsletter sponsorships. I'm cross posting my early analysis of 900+ email newsletter ads over the past year as I thought it'd be relevant for this crowd. Please AMA- I'd be keen to hear suggestions for further exploring this data.