So you do that yourself and after that complain about it lol, doesn't make sense to me.
Also if you play long enough you could've easily horded upgs every time they were sold which was no problem and only meant more money for PWI, there was no increase in scarcity(since the supply was infinite) which is the economical concept that in this case drives the price of upgs through the roof. I honestly don't see a problem with people hording upg items since this is a nonfactor. People hording items or not, I doesn't matter. There are not enough Upg sold on the EM to make the price drop(because there are not enough upgs in game compared to the demand, especially now some classes became viable that weren't before, thus there being way too few upgs for these builds/classes), this can only be solved by PWI selling them.
The only way hording items works in a ''negative way'' is when a player could get him/herself in a monopoly position in which you'd have to hold say 80-90% of the upgs on the server and PWI should announce to never sell upgs again. In that case it would be a serious problem because that one person could decide the exact amount of upgs he/she'd sell and the price of them.