Quote (extravagant @ Apr 23 2013 06:07am)
you can archive messages
so you already have an unlimited inbox
This, first and foremost. I can't imagine having 50 recent/relevant messages that you'd need filling up the inbox; although some people do a lot more volume in trades than me. When I get PMs, I'm on it though, I respond/delete/empty trash. Why save em? if for potential scammer, take a s/s. If a friend, add them. If it was a great message archive it. There's plenty of options. From what I understand, the staff have expanded boxes because they get a ton of wah-wah PMs on a daily basis from all different people, and if for some reason they are unable to answer/clear, that doesn't make people's wah-wah messages any less

. As far as members are concerned, if you're getting a lot of messages but can't respond/delete enough of them to allow someone to send you another, most likely you'll be backlogged enough with the trades etc. it'll take to clear the list that half of the people will have found their item/answer/etc somewhere else.
A good idea with the best of intentions, but given proper inbox maintenance it's rendered completely unnecessary for non-staff jspers.