>>2350001
For the archive permanent gallery of Q's posts + those who he responds to, that is what I upload. For the spreadsheet, I use the first link due to the fact that the 2nd (with the person's filename) is attached to a script to auto-download. That would freak people out who are reading the spreadsheet & just want to view (not download) something on a chan (think of a normie's POV - it would be scary since they don't know what the image is).
tl;dr
postimg.cc permanent galleries = 2nd link to image
spreadsheet = first link to image