A. Earn a "Pick a Prize" Every 20 Loot bags you acquire! (You can acquire loot-bags from Daily and/or Bonus redeems)
B. You have until July 24th 5 PM PDT (July 25th 12 AM UTC) to earn Bonus redeems through Pre-orders.
C. Jul 17th 4:59:59 PM (PDT) / Jul 17th 11:59:59 PM (UTC) < the last time period you can earn other than Pre-Orders
D. You have until July 24th 5 PM PDT (July 25th 12 AM UTC) to redeem your "loot bags" and select and redeem "Pick a Prize" rewards.
Sooo. I take this to mean that anyone not getting their 150 bags of loot by the 17th 4:59.59 PM (PDT) then have up to the 24th 5pm PDT to buy bonus Pre-orders that are listed to earn bags.
Caveat. D, that is a big warning. While yes you can buy pre-orders up to that time on the 24th, it does also happen to be the deadline to redeem any loot bags and picks.
So you are only 5 bags off? Buy a Hero Pre-order. 20 bags off? Buy a Civil War Escalation Pack.
If you were thinking about getting the packs anyway (I know I have been looking at a Hero Pack) and you need those loot bags for those cool patterns, then there you go! Looks like I might be taking a closer look on the 18th on what packs I may desire... :-)
Here is the Bonus info:
Bonus Loot Bag Redeems
Owners of the following packs - Available on any day of the Loot Bag Event - These do count to the Pick a Prize Total!
If you own a Clan wave 2 and 3 HERO pre-order you will receive 5 bonus Loot Bags per Hero 'Mech pre-ordered (up to 45 Loot Bags in total).
If you own a Clan IIC HERO pre-order you will receive 5 bonus Loot Bags per Hero 'Mech pre-ordered (up to 20 Loot Bags in total).
If you own any level of the Osiris pre-order pack you will automatically receive 25 bonus Loot Bags.
If you own any level of the Nightstar pre-order pack you will automatically receive 25 bonus Loot Bags.
If you own any level of the Arctic Wolf pre-order pack you will automatically receive 25 bonus Loot Bags.
If you own any level of the Nova Cat pre-order pack you will automatically receive 25 bonus Loot Bags.
A possible total of 165 Bonus Loot Bags from Bonus Redeems!