i just got off the phone with CS.
she specifically told me that you will enjoy the Diamond perks during the 60 day trial. Not sure if it was because i'm currently Plat or stam anyone can just decide to go for diamond and enjoy the perks
I mentioned that i did this last year and did not complete, didnt seem to bother her
She also chatzi confirmed that you need not show status at another hotel chain to participate.
BAD NEWS she told me that bec i wasnt meeting my tier requirements for plat i may lose in 2015... yes even with a hyatt card