I wish the minority were larger, or large enough to have some market impact. Although it is perhaps growing in recent years to due fairly blatant abuses of power to push agendas.
Such a service would make plain a simple truth we don't want to acknowledge: screens hold powerful sway over people, and algorithms hold sway over screens. That power (mood manipulation) can be used for good or evil. Maybe if people are given control over their own tools in this way, they can better appreciate the control that is exerted on them by others, and so better resist it.