This is an interesting system, I'm not sure I'm a fan exactly, but it is interesting.

Basically, if you run a newsletter on a major newsletter platform (besides Substack, for some reason) then Sparkloop helps you find other newsletter subscribers in their network that might be interested.

They have a network of newsletters, and you can show up in them for a fee. It's a rather steep fee, but a newsletter can be a high value business, I guess.

You can also build your own referral system for your own newsletter, so others can be rewarded for referring you.

Generally, it's a newsletter audience growth tool, with a few different facets.

I've run small newsletters before, and I see the value, but it feels like it's mostly built for already highly-established communities, and it's not very useful for a beginner or early stage maker like myself.

Just my opinion though.