The project was able to get a CA to sign their keys, this is what happened. Using the word "trust" is simply wrong and might be interpreted as a too simple kind of propaganda after we learned a lot about the untrustable nature of a hierarchical certification infrastructure.
Another, even bigger trust-breaking elephant in the room is the fact that this project is USA based - as long as US government and agencies are insisting on practices we know from authoritarian and anti-democratic states like e.g. China or Saudi-Arabia there is no way any US based project can use the word "trust" for their product description - it might be recognized as a simple lie by informed people.
Questions to the project leaders:
* you must obey US laws and therefore offer MITM access to every Let's-Encrypt "trusted" network stream - why aren't you educating your users about this serious limitation of your product?
* why don't you rebase your project to a country where a government policy exists that is allowing companies to build trustable security based products?