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I don’t. I chose to purchase the pro version for a few bucks.

I don’t know any open source client that is even remotely as nice to use as Boost. Also, it’s not like the developer is actively spying on you, that’s just the default AdMob popup Google is now forced to show (They simply didn’t ask for any kind of consent in the past).

Anyway, I simply paid a few bucks for ad-free Boost.