You might need to reframe things a bit. Marketing isn't just sales and making the world feel like a Ryanair checkout experience. A lot of it is just about bringing up something people want at the time when they need it.

In many cases, you find your target market, find someone with that market as their audience, and partner up with them.

A few examples: a web dev partnering up with a designer whose clients always need websites and apps, a travel insurance company partnering with travel blogs, a health insurance company partnering up with relocation consultants.