I guess the only "problem" for them is what to do with the increased influx of auction fees, since the item price consists almost entirely of markup. They must have foreseen this "problem".
If any of the described exploits or behaviours of players lead to increased income, whether intended or foreseen or not, then it leads to the same motivation to fix the "problem". Which is zero. They only shoot themselves in the foot if a larger income stream runs dry because of people quitting over perceived unfairness. I guess that's a thing of trial and error to find out.
So, when searching for an explanation, always follow the money. No, I don't begrudge a company its revenue. Otherwise none of us would be here. Just some of the tricks make one feel jaded. Really jaded, if you were ever hoping to win something other than a good time spent with entertainment.
