Well, I just figured something which just might make even more people angry and might make them quit playing the game.
http://www.elvenarchitect.com/ - this is a city planning web site for Elvenar, it is up to date including chapter 8 and the daily and grand prize rewards from the Summer Solstice event.
Once your city is laid out or loaded, click the build icon, then click events tab. You'll find all the rewards from Summer Solstice there.
*** Drum Roll***
After some close observations, I found out that the population and culture of the daily and grand prize buildings vary depending on your in game chapter progression.
When you have the Solstice window open in your game, if you hover your mouse over the grand prize buildings, you will see a chapter flag/ banner in the upper right of the description. This changes depending on what chapter you are in. Same applies to the daily building reward though there is no flag/ banner visible.
In the city planner site, if you go to build one of these buildings, there is a drop down menu to select the chapter you are in.
So not only is this event more friendly to the diamond buyers to speed their way to moon splinters and chests faster, now you are unfairly treating players who are new or not as developed as others by making a differential in the statistical value of the rewards.
One wonders why there is so much negative backlash when a continued pattern of poor thought process and planning is evident.