I like to do it to clear out my inventory quicker. The logic is, is that I open up my supplies to additional customers. The people wanting the product to begin with, and also newer customers who play the 'buy low and sell high' game. So by opening up my product to additional customers--I create more sales.

I also enjoy annoying entitled crafters. Because some of these people are incredibly short-sighted. They'll literally cry to me that I'm doing it wrong, and that I'm hurting their margins, and call me 'greedy." The irony is I'm not the only greedy one if they're goal is to soak fat margins off the public. They LITERALLY want to extort the player-base for as much money as they can get, and when I counter their extortion prices--they'll cry that I'm the greedy one for tanking the economy for the lolz.

I wouldn't loathe these people as much if they were honest with themselves and just grumbled about losing a profit margin because they like money like Mr. Krabs. But It absolutely triggers me that they'll cry about the morality of the market, and how I'm the sun of Satan by selling things at a loss. As If'm chaos incarnate. And that it's morally wrong for me to disrupt the system. And that only if I let them price-gouge the player-base would things be right. But honestly, no one is entitled to price gouging the player base. And those people who legitimately feel they're entitled to that, and cry when under-cutters ruin them--they have serious mental problems.