One of the best examples I've seen is digital ocean. When ever I google a sys admin type question, there is a digital ocean article as the top result.
I ran into a similar situation the other day trying to put together some apt packages in a way that was clearly off the beaten path. Found a company blog post that walked through pretty much exactly what I was trying to do.
The marketing portion of it? At the very very end of the article was "And here's the single command you'd need to run to do this with our tool." I didn't end up buying the tool because it didn't quite fit some other requirements I had, but it did very effectively get me looking at their product and evaluating whether or not it'd be good for me.
Maybe that's why I have droplets, they got me by providing a good well priced service. /s