FoE is InnoGames most important game in regard to income. They do run marketing campaigns many places – Also on TV Channels and Outdoor.
Secondary InnoGames is currently building a new team for another Game Franchise – From what I have read it is most likely going be a game for Mobile.
I have taken a few surveys over the years from them – this last one was blocked by my browser.
I though never had such inrtrusive questions for income, where I shop or directly quesitoned for Children.
My best guess is that they are looking at their player base to see where their other offers and most likely the new game can be promoted and to what price, target group specifics etc. The more they know the better they can tailor a new game to fit the criterias. Such stuff backchains to development costs and many other parameters likie age etc. making the basis for the development and core framing of the target group.
FoE has exisisted since 2012 and Inno can "monitor" nearly every action players do – it is higly unlikely that they do not already know their FoE player base quite well. It is a free game – how much money is spend is a pretty clear number. It is though not always clear if a certain event and offers along with the event will be spurring more Diamond investments or not. In the end the user still choses if he or she want to use monery or not.
Wihtout haven taken the Survey in question – I guess that it has less to do with FoE only and far more to do with other Inno Game developments. That said FoE has been under a constant change for along period. At times it has been obvious that development have been in a somewhat crisis implementing extras that essentially has not really added much more to the core experience overall. They might also be looking for where to take FoE in the future.
Over this about five years period it is safe to say that the whole concept has been challenged – started as a inspired game with a clear aim to build on th e known history of man, till the contemporary Era was reached - Then part of the conceptual troubles began. The rest of game market has moved in many new directions meanwhile – Games made for Mobile platforms has been coming at an immense stream in this period.
With regard to Inno being a German based company it is often so that the Germans are not always first movers – but when they finally decide to go in a newer direction if will happen. I think to some extend Inno have had this same development process - Just Look at the UI and UX design of FoE, it is highly old fashioned and rather conservative, more like games 10 years ago. I live in germany and one can still find an immense amount of websites that are so 2006. Even official websites have not exactly been user freindly – always a lot of information to read before finding the button to press to proceed. That said the whole startup industry in Germany is very vibrant now and I am almost sure that Inno games now have a lot broader culutral staff from many places around the world than they did at the beginning – this will change what kind of games Inno is going to offer in the future.