I looked over survey and would consider it spam....
I just took the survey and it didn't ask for anything like and email address or anything like that. Just straight forward questions. It also looks like it was put together by college kids as some of the questions don't have enough choices.
I did it. You should use one of those 1 to 5 (or 10) scales to get a sense of the validity of the responses. I'm no expert in info gathering but have taken part in enough surveys to notice they all use something similar.
Don't let life get in the way of living.
But, my knees still hurt!!