‘The tyranny of apps’: those without smartphones are unfairly penalised, say campaigners
(www.theguardian.com)
I avoid the grocery stores that have 'loyalty programs', but when I'm there I always eagerly tell the cashier I'd like to sign up. They give me the blank paperwork and the discount, and I toss the paperwork in the trash on the way out.
Does it mess with the database. Well, I hope so, but for me the point is only to get my grocs at a slightly less rip-off price. Mostly I go to old-fashioned businesses that make money selling whatever they sell, not selling my data.