Plundering Trade Routes - Works ? can`t see any change in $

[ys5]

I`m placing a navy on a red line, where I see the amounts of trade of some enemy nations.
The piracy flag is flickering. I`m allegedly plundering

But, no change in money

How do I know? Because I tried loading the auto-save and moving the ship away from the route, no change in money.
I also tried to let the ship stay a full turn on the same place.

So Questions are :
1. How do I get money from that
2. Should I let the ship stay for at least a full turn?
3. If an enemy is trading with a non-enemy of mine, would I still block it ? and would I still get the money ?

Thanks

[ys5]

Ok, now I see the change, it just takes a reloading of the income summary to see