I tried it and it's super easy, you don't need your Safeway Card, it just asks you if you are a Safeway Club member and if you are you just enter your phone number and it tells you what your discount is. I had three so I had a $ .30 discount, easy peasy! It's simple to earn points, $1 spent on groceries equals 1 Point, same for prescriptions and right now every $1 spent on qualifying Gift Cards equals 4 Points, you could buy Safeway Gift Cards for yourself, use them like cash and earn 4X points.
P.S. Make sure I can reply back to your comment, or if you comment as anonymous at least leave a first name so I when I announce the winner you'll know it's you.