For those of us who don't drop our cards, a pick up thread is not necessary.
Adding pick ups to the Monster Number Thread would make it go crazier than it already is.
As the custodian of that thread, wading through scans without updates to find updates would also drive me crazy. However, posting scans on that thread is not discouraged per se.
Leon, with a Monster Number of 512, I have branched out into type collecting and currently own 26 out of 104 on my type list, which is bound to get longer as well. And "No", I'm not going to start a Type Number Thread. I'll leave that for someone more of your "type".