Never ordered during holiday season, but with Christmas coming up and massive amounts of presents secularist in the mail soon, what is the good and bad? (Holiday sales, slow mail, chestnuts roasting on an open fire) Is Christmas time good or bad for DNMs?
Two things, US-based:
Mail gets mad slow starting mid-December. Expect a flurry of complaints right here in this very sub.
Lots of vendors go on vacation toward the end of December. You'll see lots of profiles updated to something like "order by December xxth" in order to make a cutoff.