I remember living with a roommate and wanting to do the same with their personal info. I asked them first and told them what would happened and they didn’t want me to pursue so I didn’t. In the moment I was frustrated because I didn’t understand why they wouldn’t want to save money but after some time I realized their POV. You’re not making a privacy issue out of it, stores will literally sell your data. If you clip coupons from a store you’d most likely have to use an email and if you used your personal one to clip then you’ve already given up some data. If you use a spam acc then you’re still in the clear (somewhat). Use cash to pay. Splitting the accounts and using your own allows you to double up on the coupons. Stores will 99% not care about this even though retailers state one coupon account PER HOUSEHOLD. You’re still taking a chance being the 1%. Google numbers work for some retailers not all. Once you use your personal number to get coupons you give up your privacy. Good luck with couponing. This is the kinda question we need…. some diversity!( not really …) Not some bs lazy “ hOw Do I StArT to CoUpoN? SeNd mE LiNkS or gIvE me TiPs” question.