The problem I think here is the Youtubers, and the like, who are speaking and presenting their opinions as if they were fact, and that is likely the case with regard to the pricing information you heard - I have yet to see Microsoft release such information. For instance, in one particular youtuber's videos he keeps saying "seasons are confirmed" for FS2020, when actually they haven't been - simply having snowfall in the sim is not seasons. For now, seasons are still only a wishlist item, like helicopters.
I suspect we won't see the price/pricing model until very shortly before the release, or if that information is released well in advance it could change by the time of release based on community response. Personally, I wouldn't be opposed to spending a one time higher flat fee for the sim, if that were truly the case, knowing that it will be continuously updated and supported, without further cost, for hopefully a very long time. I really don't care for the P3D way of things, having to shell out quite a bit of money every couple of years or so just to keep up-to-date on the next improved installment of the exact same simulator platform, which I think has really fractured our FS community.
One of the things I keep going back to is one of the aspects that Asobo/Microsoft representatives have talked about in reference to the photogrammetry cities. Bing continues making more and more of those photogrammetry cities and every time another is completed that data automatically gets fed into the sim, so each time you load the sim, connecting to the online server, there could be another such updated city, newly and automatically injected since the last time you were in the sim. I believe for this reason too they don't present a fixed figure on the number of photgrammetry cities, they just say there is "well over 400". It sounds like other aspects of the sim will be updated over time in the same style manner, accessed whenever you connect to the servers. That sort of model of continuous support and advancement I really like.