Loyalty program influence on purchase habits

Hello, I'am 4 course marketing student, and my bachelor thesis is about how loyalty program affect purchase habits. I have some few questions for you guys, so hopefuly I will get your support :)

How old are you?
Do you have any loyalty program card (supermarket chains)?
Do you think loyalty program cards affect your buying routine?
Are you feeling being influenced to buy more than you need by loyalty programs?
Did your purchase list changed after you get into loyalty program?
Do you spend more after becoming member of loyalty program?
Do you think that millennial's are affected less by loyalty program than oldery?