Agreed, to be a "religion" it should have more than one follower. I don't think they have to all believe
exactly the same things, as there are variations and divisions of belief even within mainstream religions. But there should at least be some commonality of belief, or a shared administrative structure.
The idea that Christians should serve God and the poor was popular in my day.
But a religion could be molded gradually by a series of tiny steps, especially if given time to develop apologetic explanations to cover for what seem like contradictions. I remember reading that a prominent Christian leader proclaimed Donald Trump to be sent by God to rule us, and his idea gained some popularity. I prefer to let the religious sort out for themselves what's consistent with their doctrines.