My point is that this information is already available and visible in-game, and that you could do it if you wanted to. MM just moves it to a different location, does some calculations on it, and collates its history in one place. Trade guild leaders who are kicking people based on gold per week would be able to do that anyway if MM didn't exist and they did the calculations themselves.And do you do that? no. you would have to constantly check it every minute and write down every single sale.How much personal sales detail does Master Merchant give that is not available in-game already? For example, I can go to the Guild Sales History and find out what everyone in each of my guilds has sold, and for how much.
DPS, on the other hand, is not readily available or visible in-game. Unless MM is doing something with data that cannot be seen in-game, I don't think such a comparison is very useful.