* Marketing websites need to be mobile first. Your first impression will be on a phone even if the product isn’t usable there. The demo should be a one click on an example domain and you might even fake the formatting.
* Put the case study logos on the home page for social proof
* A much simpler and more useful solution to API testing is to scrape or record latency data from prod. With that data I don’t have to worry about authentication or making sure the automated tests are hitting a realistic account setup. Those are the hardest parts of doing synthetic performance testing and you expect the customer to do those for you.