Tonight (Tuesday night), my friends took me shopping to Rami Levi in Mishor Adumim. At the entrance there were booths for signing up for the new Rami Levi Club Card. It cost 25 shekels but they give it all back to you on your first purchase. No brainer - get the card.
From what I understood, the free club joining is only in Mishor Adumim.
They may do it at other branches in the future.

Make sure to have a Teudat Zehut or other photo id on you.
They will ask to see it.

Today (Tuesday February 2) and tomorrow (Wednesday February 3) only, they have these huge club sales. I scanned in the 2 sided flyer below. These sales are for club members only (which right now in Ma'ale Adumim is free to join - see first paragraph). These saving may be also at other branches in Israel. Call your local branch to find out or
their main number at: 1-599-590-500.

The lines were long but the savings are very big. 25% off various brands below. Almost everyone with a family were buying 2 of the big packaged toilet paper (any brand, any size - ie: 56 rolls). Never saw so much toliet paper at the checkout counters. The limit is 2 brand items per club customer
- meaning if you bought 3 osem items only two of them will be 25% off.
However, you can buy up to 2 of every brand on sale.

I do not work for Rami Levi.
If I did not go shopping tonight, I would not have known about these sales.
Tomorrow (Wednesday) is the last day.
I would recommend going early.
The hours Wednesday are from 8am to 11:45 pm
If you want to check about any changes / supplies running out before going,
their phone number in Mishor Adumim is 02-633-7340

Enjoy your shopping!
Jacob

The flyers (available at the entrance of the store):