As far as I understand it, yes, the rules the big tech platforms have ARE just. In this case the customer (Parlor) didn't follow the rules (ToS) and was given

As far as I understand it, yes, the rules the big tech platforms have ARE just. In this case the customer (Parlor) didn't follow the rules (ToS) and was given notice as to what rules were broken and how they needed to fix things. They did not correct their actions and so they were removed. When they took corrective action, they were allowed back as customers. Seems pretty simple to me. Now, the question of "even" enforcement is another matter, and I don't think I have enough knowledge or background to have an opinion on that.