I have no doubt FC3 aircraft are good sells but this is not only due to FC3-level fidelity, it also stems from the fact that we do not have DCS-level fidelity of these aircraft and when the featured aircraft includes the F-15C, Su-27/-33, and MiG-29A/29S, it's not hard to see the appeal. All of those aircraft for the price of (or less than) one DCS-level module? Very good value for money and a very good entry point for those starting in the simulation genre. Also given that this is the third iteration of that module, I'm pretty sure the profits from it are quite good considering how much work/investment has been put into it. FC4 is only similar in the sense that it will feature FC3-level fidelity. It will feature aircraft that have DCS-level modules. It will be the first of such a module. I am sure it will get some sales but eventually, people will realize that they can buy the DCS-level version and learn to work the aircraft once instead of twice, at which point we are back to the original target market such as yourself which IMO is a small percentage of an already small population.
I'm not going to spend a bunch of time trying to find posts to reference, but it's been mentioned before by Wags and ED mods that Flaming Cliffs aircraft are actually some the best selling aircraft and are that the very vocal group on forums and that play MP (and prefer only hard core modules) are actually a minority in their customer base.
So given that ED is the one with actual sales and market data and stating this makes sense from a business standpoint, I'd say the burden of proof is on those that wish to prove this wrong, not on me to prove why it's a good idea.
Of course ED will choose to listen to their silent customers and ignore the vocal ones. That's how you make money, isn't it? Make a poll, but then do not follow the results of your poll. Make a forum to get customer feedback, but then argue that a lot more people buy your modules and the vocal customers in your forum, the people who actually engage with you, the people who you can see as good word-of-mouth recommenders, these people are actually the minority and don't know anything about business.
stating this makes sense from a business standpoint
Constant delays and inability to meet their own deadlines?
Hiring NineLies as official moderator for their English forums?
I'd say ED first needs to prove to us that they know what they're doing!
I'd gladly take on the burden of proof if ED lets me in and show me the numbers so I can prove/disprove the claims. Besides, ED deciding to take on this project means they think it's a good idea. Does that not therefore mean the burden of proof is on them?
I can easily point to all the "no" answers on their thread to show that a good number of people think it's a bad idea; they'll have to release FC3 sales numbers and ED forum membership numbers if they wish to disprove/negate that. Besides, just because someone is silent on the issue does not mean their answer is automatically a "yes."