This idea would probably be a headache to implement, but has any service tried something like charging $1/$x for specific features? Feels like Twitter would be

This idea would probably be a headache to implement, but has any service tried something like charging $1/$x for specific features? Feels like Twitter would be the prime candidate. Ad-free article access could be $1. """Editing""" tweets could be $1. Ad-free Twitter could be $4-5 (as that's what Twitter makes per US user per month via ads). Etc. IMO Patreon has already broken through the mental mode of "sign up for multiple sub-$5 things and have a single bill at the end of the month." Any big services out there doing a-la-carte premium features?