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Four Seasons, unlike Ritz Carlton, is not part of any chain with lower-cost options.
I have worked for them and stayed in them (after working there I realized why it costs more, they really do a better job at most things than other hotels) and there’s no magic.
Although they are part of the Amex Platinum Fine Hotels and Resorts so you can sometimes get an upgrade or a property-specific amenity (usually a spa or food and beverage credit) if you book through the Amex portal.
But the portal prices are usually higher than booking direct.
The other option is to work for them, they offer great comp rooms for employees.