I get daily 3-Bureau "updates" ('cause it really doesn't) via AmEx CreditSecure (mostly for the "Bumpage", where you remove hard-pull inquiries off your reports by pulling daily). Since those scores are really "FAKO"s (not really "FICO"s), they're a little different, and since all three reports are all fairly different (like my car payment, whose account is described differently in all three reports) my score varies and I can't tell if the EX AmEx reporting makes any difference).

I'm not sweating it too much, as I assume that since AmEx has been around forever they know how to classify it.