It seems like starbucks just reversed this. I used to have to use a registered starbucks cards and was supposed to only get 1 hour a day ( it never cut me off though). However recently I noticed that all the starbucks in my area have gone to free wifi. Just accept the terms and conditions and you're set.
Yeah, they just made that change a month or two ago. I'm going to guess that they figured out they were losing business to either smaller chains or mom and pop stores who were offering free internet.