There are a few other threads on this topic that I've posted in, but I'll say it here to: I called on Friday and PCed from the Zync NPSL to a Premium Rewards Gold. The CSR offered the Gold and Platinum. No HP necessary. Cardmember since 2010.
Just got off the phone with AmEx. A very nice CSR spoke with me for a while, and will be calling me back in a couple days to finalize my PC to a green card from a $500 hard limit Zync. I didn't realize today was the 15th, otherwise i would have waited until tomorrow. And she is off work tomorrow, so that's why it will happen on wednesday.
I have considered it. Not really for rewards, but to get away from the hard limit zync as cheaply as possible. I would just stick with the hard limit zync, if it wasn't preventing me from getting an amex revolver. I am planning on keeping open an AmEx charge card until I can get a BCE/BCP.