- A very slow website is trying to sell me a product about optimizing my product. That immediately kills my first impression

- More specifically, the blocks takes ages to display after scrolling on mobile

- There is a horizontal scrollbar on mobile, which is annoying (Kiwi Browser)

- You should drop the fancy JS and make plain HTML pages, or it's going to hurt the performance and SEO.

- After quickly reading the webpage, I do not understand what this it about. How can a third party product make my hand crafted 10-endpoints REST API faster? Is it some kind of CDN? Or analysis tool to help navigate big APIs? (in the second case, you should clearly sell it as such, because it does not actually make anything faster by itself)