I truly apologize for these long posts, I will shut up and keep my posts shorter in the future

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You cannot blame the player for the economic ramifications of running macros, no more than you can blame a business for churning out excess merchandise to undercut the competition. In your econ 101 class you may have learned about inflation, but in later econ classes you would have learned that there is a powerful tool built right into inflation that is its most dire nemesis. Supply and Demand.
While 1000 players will macro to their hearts content to make $250 for 50k platinum, more and more supply into the system will generally weaken that platinum price. If you study auction sites like playerauctions.com and look back in history of sales you would note that platinum prices are steadily falling. So while a price of $250 for 50k pp will keep 1000 people macroing because it is profitable, as the price point drops lets say to $50 per 50k pp, a lot less people will attempt macroing for pp because it isn't as profitable.
So in that vein, the supply has risen, prices have fallen and the amount of people macroing is now less, so prices again begin to rise and more people begin to macro and so on. Eventually you will hit a balance between the number of people willing to macro against the amount of money that you will make for said macroing.
And to quote you: "I am not saying that Macroquest should be banned as a whole, just not used as a money making scheme... "
Let me just say, in the words of Christ, "Let he who is without sin, be the first to cast the stone."
The DarkSoulX username seems to be an active playerauctions.com seller of platinum pieces. Have you maybe been macroing to make that platinum? And then the reason you complain is because you can no longer charge your high prices for that same platinum?
Do not be angry with me my friend because I bring your prices down, for I am Capitalism, and I have been doing this since the beginning of time.
And I warn you now, look behind you constantly, for there, behind you will be my characters, mass producing items to undercut your elitist ideals that only certain individuals have a right to the ability to make money from EQ.
And if Verant shuts me down, I will wipe off the dust and start over. Because that is the thing about Capitalism, it will let you start from nothing, if all you have is drive and a good work ethic. And I know that I am not alone.