It's amazing: it is almost impossible to tell whether this is satire. I almost thought https://www.reallygoodux.io/about clinched it, because the "Submit" button had scrollbars in Chrome, but, alas, Firefox renders it without them.
In the final analysis, I find it hard to believe appcues.com would do such subtle satire.
In the final analysis, I find it hard to believe appcues.com would do such subtle satire.