Over the years numerous times ZOS responded strongly on their position why the designers do not want an auction housing system in the game.
However TTC is exactly that. Since it's inception it has created a whole Auction Housing system inside and outside the game.
Anyone can tap to the API to get the lowest prices across Tamriel at any moment, buy in bulk in matter of minutes of posting something, and sell them at much higher prices.
In addition the addon allows tampering with the market. If someone checks the website where to buy something, it will see dozens of records of the lowest prices from few people on 1-2 guilds.
Those prices are there just to make the new players to put something at those prices and buy cheap. While the correct price of the items are 10-100 times more when someone visits that same store.
Also TTC completely screwed the Merchant/Trader auctioning. Since any guild can pick any place and if pricing is right people will arrive at it.
Long gone the must have spots like Elden Root, Rawl'kha, etc.
Am I seeing this cancer affecting the market, or everyone is happy paying exuberant prices to scammers?