I think you are trying to give credit to your idea too hard, some ideas are good some are not. ED is not losing any money if you look at your pool.
You are looking at this from a very wrong perspective, you didn't take into account how much ED would lose if they turn to subscription model, so you have 8% that would pay that sub but those 8% are still buying modules, they didn't give up on this simulator, so ED is not losing any money.
On the other hand, you have 92% that would not pay that subscription so that means ED would lose 92% of its payer base.
You cant make a business model without research, and I know you didn't do any research on this, cause if you did you wouldn't post here, you would know that's not how it is done,
if you want to propose a business model you need to do your research, work out a model and go to the management and say hey guys I'm (insert name), I work at (company) and I have a business model that I think you should consider, if you are interested we can schedule a presentation.
That's how this is done, so stop prolonging this bad idea pls and move on.