It may not be a whole lot of money to wipe out the 2s, but to see a billion on 2s and not a lot of buys, people arent going to take a big swing at them. They put their money on 1s and eventually got filled. If it was at 300-400mil maybe some bigger blocks would have hit IMO. Not sure.
What do u think it would take from the MMs to let it run? I dont know as much as most long term investors but it just seemed like with 1bil on the ask the appeal was not so great.