Just received the feedback survey from developer@mail.salesforce.com, and it is saying the survey is closed. Here's the link:

https://www.surveymonkey.com/survey-closed/?sm=GUqI_2FIeqo_2B4oQWrfUVyP3VMvPM4pC6J0Vbro_2Fl33WvO2UtEJITscZnqGWeSW7mZg_2FKdY8HQRpkGCNz6j9nFeJSt_2B3S5Nj_2BQeqlUPJeiW0JM_3D