I believe they just sold out because the email from yesterday afternoon said:
"But this year we're not going to offer you just one special, or even two. P&C, in celebration of this special day for pipe enthusiasts, is bringing you THREE amazing deals, all beginning right now! "
I concur about people throwing tantrums. I'll be honest, I only ordered to get the goodie box. I certainly don't need anything, but I imagine the days of being able to celebrate ISPD with online specials will go away in a couple years, so I find it fun to participate while I can. At the end of the day though, it's just a sale guys, calm down.