- the taxes defined by the Black Market can't go below 1%
I believe there is a bug in the game when it comes down to showing next level effect:
No, that is just a not too super clear denotation of what it does.
Unlike other similar buildings, this one shows you the effect the next level would have. As you've reached the max effect already, the next level would give you -0% reduction, so none.
I agree, this is not super clear and confusing as it differs from the display in other similar buildings.
Noted and forwarded.