1.) Hard for Content Newsletters to Find advertisers and sponsors.
2.) Very difficult for startups who want to advertise in newsletters to find similar newsletters to advertise in. (no central location - have to find advertise area on website for each newsletter or email publisher directly for smaller newsletters)
This isn't just something that's new for newsletters. I believe this was inherited from direct mail from magazines and publishers. I remember pursuing a startup idea in high school, looking for ways to reach out to highly targeted magazines, and being pointed to a directory in the library. And even the library didn't have that directory.
My Solution: BuySellAds.com type of website for content newsletter publishers.
My Minimal Test:
Advermin.com - Performable Landing page to see if there's interest in this. Landing page hooks up to mailchimp. For first few weeks, I'll send advertising opportunities from friends who own content newsletters - see if there's interest and if we can pick up steam.
Finding if publishers are interested by using howtosubscribe.com to find newsletter publishers.
(1) Too small of a market. Some of the data from EasyUnsubscriber.com shows me that most email newsletters are from newsletters that are selling a product or service or are extremely interested in driving traffic to their blog.
(2) The larger newsletters (highest value customers) probably don't need someone to find opportunities because they're popular enough to attract advertisers directly.
Target Newsletters include content newsletters like HackerNewsletter and Startup Digest.
Final Plea: Please poke holes in this. Tear me apart. Spit on my ideas. I want to save time and focus full attention on easyunsubscriber.com if this idea isn't worth pursuing. All input appreciated.