Not sure if you intended this precise angle on it, but laying it out explicitly: If you compare a paid subscriber vs other readers, the former seems more likely to share your values and such, as well as have a higher prior probability on a thing you said being a good thing, and therefore less likely to e.g. take a sentence out of context, interpret it uncharitably, and spread outrage-bait. So posts with higher risk of negative interpretations are better fits for the paying audience.
Not sure if you intended this precise angle on it, but laying it out explicitly: If you compare a paid subscriber vs other readers, the former seems more likely to share your values and such, as well as have a higher prior probability on a thing you said being a good thing, and therefore less likely to e.g. take a sentence out of context, interpret it uncharitably, and spread outrage-bait. So posts with higher risk of negative interpretations are better fits for the paying audience.