Double standards of Mods of this sub

I can't believe the double standards on this sub right now. There are many posts where people are SELLING IMAX tickets for Interstellar, and the mods are doing absolutely NOTHING about it! But when I posted about Coldplay tickets, just asking if anyone wanted to join me since I had an extra ticket, my post got REMOVED. I wasn't even blackmarketing, just trying to share an extra ticket. What is going on here? Mods, why are you completely turning a blind eye?