Tthe years in which the two features were introduced were correct. It is likely that the town used for this video did not have a market build (and many other buildings). As previously mentioned, the timeline on the home page offers most of the answers for Game 2.
There is this trailer of the west posted on 29th Januray 2011.
In the trailer you can see that pants were already in the game and on city there is no market.
That means that pants were introduced before market.
On game number two, how comes that the correct answer is 2010-market and 2011-pants?