Yea, I don't really see the revenue potential here. They seem to be doing this purely to force developers to have a "formal relationship" with them, and to grief all other developers who don't.

Same mentality behind companies who insist users have an "account" to use their otherwise-unconnected products.

I haven't seen anyone put this dynamic in such a clear and succinct description - the fact is that a lot of people (especially corporate managers) just hate the loss of control and will go out of their way to ban people accessing their things "wrong" - even if it's counterproductive for their larger corporation or a goal.