I think the real problem is how shady it seems. Like has everyone forgotten the concept of "grandfather in"? People will make new games in unity if they factor in the cost. I think people are understanding if they have the priory knowledge that unity needs to maybe start charging something. But sounds like they are asking for after these businesses already have created budgets. It sounds like it could be a bit of extortion depending on what the original agreement was. " Extortion might involve ... damage to a companies financial well being."