Does anyone know if the gold sink actually changed prices on the marketplace, or is it rather the time that changes loompoint and loom prices (meaning the longer people wait to sell their items they go down with the prices and by time loompoints are costing less)?
However to be honest, gold is not worth a lot. Depending on your team and the time to play you have, you easily earn a good amount of gold (and depending on gear of course).
50 gold per minute, 250 gold at max per minute (less with upkeep).
Actually no one really needs gold, only for upkeep. Looms aren't needed after all. :p
(though everyone wants them)
Although I cannot answer with specificity, I can say that from my close amateur observations since late 2011 to today, yes, prices changed, but there are a variety of factors that all came into play at once so it's hard to pinpoint what input caused what output.
What I CAN say, somewhat to your point, is the following formula:
A 1.5 million gold deal is taxed 75,000.
The average multi in game is a 1.8, or so I've heard. Let's just round that up to 2.
That means people make 100 gold per in game round in-play minute. You don't get 60 minutes in an hour, closer to 45-50, but let's pretend we do for now.
60 minutes x 2 multi x 50 gold = 6000 gold an hour revenue
75000 / 6000 = 12.5 hours of play
You would have to play unarmed and naked for half a day to produce just enough to pay the tax on a MW deal with the most favorable numbers I can give. Start deducting 25% from the fact that ticks are by game minute, and decrease for even modest upkeep and you see the problem... nobody produces that much unless they're a naked stick-wielding wonderman... or a banner-leecher extraordinaire, which are legion.