Tomorrow, the government is asking you to capture messages of some users that are planning a terrorist attack.
By default your app is not capturing these messages, but technically you could do it with a specific update. The lawyers already challenged the decision, they confirmed the request cannot be avoided.
You end up pushing a backdoor targeting specific users ("a law enforcement custom update").
Court is explicitly asking you to not disclose the existence of this special update.
As a business owner, why would you reveal it ?
You'll go to jail (or struggle in court at least) for few years, have a horrible reputation and end up poor because your company is going to lose all its user base :/
This sounds like an insane decision.
The users, upon learning you got backdoored are going to go away, because the competitors "Telegram", "WhatsApp", etc, they will not have removed their canary or they will simply not have claimed anything :)
Perhaps on paper the law cannot force you, but if you don't comply you are cutting the branch you are sitting on.
The alternative is just to leave the warrant canary and live happily after.
Perhaps you even made the world better after all and actually prevented an attack.