Hello jaehyun calling how are you

I just listened your problem and I understand that  You are looking for a way to get feedback

This is indeed problem

I can give you tips

Firstly , if I were you I suggest that I would go to nearest subway In person to get feedbacks

People receive good impression

Second suggest that you should offer gifts to people who participate in surveys

Young people like free gifts , because they don’t get to work ,

so they don’t disappointed to it

for example ) my friend is a street vendor ,  he gave stranger flyers 

after that , sales increase 

I think best way to solve this problem

that's it 

part5 q. 고객들에게 피드백을 얻는 방법 을알려달라