Well, most people in the thread about that song the other day seemed to think it’s in A minor mode, like I do. As soon as the v (E minor) chord plays after the iv (D minor) chord, it definitely sounds like A minor to me (also probably in part because progressions in Dorian with a i chord (D minor in this case) followed by a ii chord (E minor in this case) are quite unusual, whereas it would make more sense in the context of them being iv and v chords in a minor progression), and when it lands on the i (A minor) chord it really sounds like a resolution to me, further reinforcing the feeling that it’s in A minor mode.
I guess this just goes to show that there’s some degree of subjectivity to what mode/key a song is in, with not everyone perceiving music in exactly the same way, especially regarding songs with a less stable/grounded tonal center such as this one. That being said, I’d still be hard-pressed to find anyone who perceives “Never Gonna Give You Up” by Rick Astley to be in D#/E♭ Dorian instead of A#/B♭ minor mode, based on the fact that the chord progression of the intro and chorus (iv-VII-v-i) starts with with a D#/E♭ minor chord, though. 
PS: I hope that we can at least all agree that “How You Remind Me” by Nickelback is in C minor/Dorian, and not in A#/B♭ Mixolydian as certain people seem to suggest. 