Pavel Durov argued that WhatsApp's vulnerabilities are intentionally created as part of surveillance programs with government agencies. [1] If that were true, Bezos's case would be an example of how that approach to security is double-edged. Backdoors can be just as useful to foreign intelligence as they are to whoever pushed for their implementation. [1] https://t.me/s/durov/109
That's one hell of a tinfoil-hat theory. How would you even orchestrate that from within a public company with so many developers involved?
Doing it this way you only really have to control a core part of the release team to hide the slight of hand between the published version and the clean 'published' version.
Alternatively just bury the same thing deep in the codebase using techniques like people use for the Obfuscated C competition every year. Any changes could be delayed/deprioritized/handled by a team in the know about the backdoor.