I'm Martin, and over the past 8 months, I've been working on a new product Tintage (https://tintage.com) where you can find niche places to advertise and their rates.

The problem it solves:

It's very easy to run programatic ads but there isn't really an easy way to find podcasts, newsletters, websites that do sponsorship/ad deals.

It also helps businesses that struggle to find advertisers.

So, it's essentially a dedicated site for any type of media that accepts advertisers and sponsors.

Feel free to add your site. Would really appreciate feedback.

Thanks, Martin