[deleted by moderator]

How is it prohibited? By the Terms of Service? Which part of ToS exactly does it violate? Most critics of KVS have said that ToS often forbid scraping, so I assume that is what you are saying. Scrapers generally read the information and store it which KVS does not do. KVS immediately presents the information in a different format without storing anything. Therefore KVS tool should be considered as an alternative browser.

If you want to argue that the ToS can forbid alternative presentation of a site, I am not sure that the law supports that*. And such a stance would mean that anybody who (for example) turns off of displaying images, changes the font size, uses a translation or similar widget, or has a disability that requires a special browser cannot access any such sites. And that they (or the vendors of those browsers) are also thieves.

(*Many users are not located in the US. Are you an expert in how those ToS apply in each country in the world? Also note that many of the websites are also not US websites.)