Probably a waste of time, I'm THE last guy on planet earth to have been able to sign up, as its only Yaeli herself dealing with it.
I was emailing back and forth with her, and suddenly she wrote that I missed the promo, so I said that it says a certain date limit, and according to israeli time, I still have a few mins, so I've sent my email to her at 11:59pm her time, and she replied that its okay. (Only israelis answer their business emails at such times(she works officially the regular hours)).
You can still give it a shot as you are dealing with israelis, but include copies of two boarding passes to aor from TLV.