They don’t even have to look at the keys, they have the app, can encrypt your messages with their key, or send the plain text contents separately, or who knows what else. Plus your recipients are not encrypted like in signal for instance where security is a foundational requirement. Anyone done any sort of audit?

A dystopian future awaits

Just guessing here but they’ll have to fall back to other means, which defeats the purpose of screening for bots. But this being google and their main source of revenue being advertising, i’m guessing they’re gonna use this technology to develop proof you’re watching the ads you’re shown