That was my thought as well. This is what Fighter Ops was aiming to be YEARS ago combined with the iRacing business model.
It does make sense though.
Problem: There is a small but rabid group of consumers who consume the ultimate flight simulator experience. The group is not large enough to be able to make a single-time purchase profitable (once all have bought copies they won't have made their money back and few others will try it out).
Solution: They can try the DLC/expansion-only model like ROF or SF2, but that requires a regular, steady output of content. Possible but prone to pitfalls. Instead, go the MMO route. Games like SW:TOR charged $60+ for the game plus a month or so of online, then after that you pay every month. Some updates will be free as part of that cost, but most new content will require purchasing on top of that.
iRacing has obviously found that there are enough rabid race fans with enough disposable income to buy a game, buy cars and tracks, AND pay per month to race them. If MC can replicate the quality of the iRacing experience, I've no doubt they can replicate the profitability as long as they maintain it.
Like Mark, I too have zero interest in this. I don't "double dip"...if I'm paying for everything I get, I want no monthly costs. If I'm paying monthly, then I better get all the content with it. For instance, if ROF was monthly, I'd certainly not be buying field mods, weapons mods, planes, maps, and campaigns. I'd expect almost all of that to be covered in the monthly cost. Since usage is free once you buy them, though, I've bought a majority of the stuff, and in the process spent far more in 18 months of ROF than any other flight sim in a similar amount of time.
However, iRacing is too rich for me, plus I don't have the time or interest to devote to it that would justify the cost...I'm not going to pay hundreds of dollars a year to either wreck or simply lose horribly against those with better skills/more time to practice than I.
I also don't have the time or money for CP. I suppose if I was either so wealthy I didn't need to work or I had a good paying job but no family I might consider it...but even so I might not see the value.
The Jedi Master
The anteater is wearing the bagel because he's a reindeer princess. -- my 4 yr old daughter