I tried submitting two different chiptunes, one in 2004, one in 2005 or 2006, can't remember on the 2nd one. Both got form letter rejected, and I was pretty much completely in the dark as to why they got rejected at the time, at least until Espergirl 2A03's thread. Then I'm like "oh, they just don't want chiptunes I guess."
If you read the thread, there isn't much room for debate at all, we didn't take it to mean that chiptunes weren't submittable, it was spelled out.
That pretty well says "no chiptunes," there is no gray area, end of discussion. Why would I bother writing them for this site with that as the precedent? I realize that they've kind of gone back on this stance and are saying that maybe there's a slim chance that it might work if the composition is crazy good, but that's now, and this was then.