Just anecdotally from my experience glancing at reviews occasionally on apps like that, that have a physical presence or a website. In the latter case I think it's inevitable and completely fair, the app can be the primary way you interact with it, how you discovered it, how someone else may discover it, and a review of the thing itself might be perfectly useful.

I think it's less likely to happen with Apollo if at all, because those users are clearly aware of, and even have front of mind in the moment, the distinction between Reddit the platform and Apollo the client. The number of people who discovered Reddit via Apollo must surely be extremely small?