So, if I got this right, the "freeze method" will not work for Citi or Amex, but has worked for Chase.
And, the best way to avoid a double-pull (as happened with AsherO), is to freeze both Exp + another bureau (as suggested by Dan).
I might try this before I apply for the Hyatt (which I need to do before my diamond status expires).
My Exp CR shows BA - 4/11, Sapphire - 6/20. I'd love to have Chase pull my TU (or even Equi) instead.