The devs are literally in this thread explaining why this contractually required language is in the app. There’s nothing “sneaky” going on, especially since the notification in OP’s post is so explicit. If you wanna share how you monetize an ad based experience without google or similar required language go right ahead.
If you wanna irrationally doom a burgeoning social media network with misguided ideals, that’s on you. Lemmy will never reach critical mass on part time unpaid devs. If you were really against your usage data being monetized you wouldn’t be using any social media as that’s a core part of how any major social network grows and thrives.