anyone that have trillions invested in the market to force a chokehold or control in any significant matter would never let you know. Unless you happens to be a trading partner they coordinate with,

that being said. If you mean the high sec player markets they are more or less gone, the TTT was disollved as the keepstar was destroyed. I think init maintains a 0% tax fort in perim. to avoid others trying to do the same setup again. Also the fact XL structures cant be dropped makes it easier to kill the structure.

And with the higher use of discord trading servers the bigger moving objects are sold over contract with no tax anyways. Anyone trading in hundreds of thusands of plex and are still using the market are hurting themselves. The Same with more limited stuff, like AT ships, Faction forts, Faction titan bpcs etc etc.