In a "free" game, with no manual, it can be difficult to follow everything and to understand what is going on. Perhaps what we actually need is a "settapedia" which could be accessed through a separate window from a button - a bit like when we open a building menu.
In it, the finer details could be listed - so there could be a section on how to trade, gold coins, there use and value, each building and the costs for upgrades etc and whether or not it shuts down on upgrading etc.
I suppose it would be like an online operator's manual for all users.
I know that there are a lot of guides and manuals in the forum, but what I see is something which is not like them, but does give a central block of reference material - e.g. in it would be a list of buildings (perhaps a picture) beside each one could be the details of the materials it needs for building, processing, approx length of time and cost of upgrades and whether the building produces during upgrades.
Perhaps also a section explaining how trading works, and the value and use of things like coins -
basically a lot of the stuff which is asked daily + it is something people can be told to go to to read - it could include the rules and language channels so people don't have to leave their settlement to read them
just a thought - it works in many other games