It's kind of suspicious though, that you cannot find any info on for example who the Adguard CEO is, on their website.

Most companies have an "about us" section with info where at least you can see who the people/management are.

Instead, they provide a vague page: https://adguard.com/en/contacts.html

Is anyone compiling from source or are most all installing precompiled binaries? How does one verify a binary matches the source with no additional code? This is a rhetorical question meant as an excercise for the reader.