Man, really? I feel kinda screwed then that Amazon is only paying $6k, before housing & misc benefits.
Even if not in Seattle, the difference between $6k and $8.5k is negligible for a 3 month internship relative to your life earnings.
However, It's only negligible if it doesn't correlate linearly with a starting salary.
If my starting salary is 20% lower at Amazon than anywhere else, you can bet I won't be returning after my internship.