There are plenty of 'taxes' in game that are cycled back in. What is being referred to here are fees that deter certain gameplay styles such as not ever joining

There are plenty of 'taxes' in game that are cycled back in. What is being referred to here are fees that deter certain gameplay styles such as not ever joining a real corp. That said, there are some currency sink fees that are used to help maintain reasonable economy stability as well. That's needed in any game with an important economy aspect.