I have found that if you call the desk and ask for a code, most times the will give a code, etc for free internet access. I have always used the rational that if local phone calls are free for elite members, internet shold be as well.
In the last couple of years, since WiFi has really gone mainstream, I have never had a desk manager refuce to waive the internet fees.
I cant understand the reason for charging Platinum members (actually any member) for Internet access at a full service hotel. If I stay in a Residence Inn or a Courtyard the access is included. I hate being nickeled and dimed with this kind of stuff.
150+ nights this year and you still want 15.95 for something that Starbucks will provide for free if you buy a cup of coffee