I guess not many. In my experience, website owners will most often opt for free solutions, if they meet their requirements, or if their website is large enough, they will get a custom solution from companies that provide enterprise level solutions. Usually this way they get a solution tailored to their specific needs, and also get other services along the way.
It's already free. The price is for the integration setup. While most WP users know how to install from wordpress.org, there are people who don't know how to, don't want to spend their time, etc.
If companies prefer to buy enterprise-level solutions, they have the same choice: installing themselves or hiring someone to do it.
You're comparing 2 different things: the installation and the development.
As for @OP, a suggestion would be to add a premium membership option:
A person pays X
BTC and get X days/weeks/months unlimited blog posts
An option for the broken persons to take a survey to be able to read a page/file/video.
The website owner receives a commission from surveys companies once the survey is complete. It's a win-win situation