(Sorry for my bad english)
If I can help developers for this old problem : After some test I discovered that our workshops produce zero gold if the city market sells to much items from our workshop.
Example :
If my workshop produce beer and if the city market sells a lot of beer => my income is equal to zero.
But if I decide to buy all the beer in the city market => After two/three days, my workshop income will increase.
So, is it really a bug or is it just the management of the economy in Bannerlord?? (Should we manage supply and demand?? Should we create a workshop that does not have a nearby resource, and bring the resources ourselves??