Tuesday, 8:40 pm. You’re paying for dinner.
Ten digits. Ten seconds. 100 points.
What you didn’t see: your name, visit history, spending pattern and birthday attaching themselves to that number in their system.
What you couldn’t see: months later, the list travelling — marketing agencies, SMS vendors, “partner restaurants”.
All because you wanted 100 loyalty points.
Then one day you change your SIM. The restaurant loses you. You lose your points. The spam, of course, follows the old number to whoever gets it next.