It's true. There's a bit of CSS. There's also a tracking script. I also needed a web server to host them, an FTP client to transfer them, plus the entire infra

It's true. There's a bit of CSS. There's also a tracking script. I also needed a web server to host them, an FTP client to transfer them, plus the entire infrastructure of the web to make this work. ;) So beneath the simplicity of "just words" is some complexity. But all that stuff is invisible for most people visiting the page. The point is that simple words on a page can be powerful and effective.