Fair? So many people use the argument of "it's not fair", yet it's the most ridiculous way to argue against gold that there is. In what way is it not 'fair' to allow people to spend their own money, as they choose to, in order to gain a small and relatively insignificant advantage?
Just because some people work for a living, and choose to spend some of their money on a game to support the developers, are they suddenly transformed into an evil, cheating monster? No. If anything is unfair it's that people are jealous/envious enough of gold users that they feel the need to come to the forum and complain about it, to try to make gold users out to be the bad guys.
At the end of the day, players who use no gold are getting to play an excellent browser game, with a huge variety of available worlds with different settings to satisfy pretty much any player's demands. On top of that they are getting access to an active forum, allowing them to chat with other players. On top of that, they are receiving excellent support from the staff, and both the ingame and the forum moderators. After all this, some free players STILL feel the need to complain that they feel hard done by, as if Innogames is abusing them in some way.
So really, what is unfair? Is it the players who spend their own hard-earned money to support a game they enjoy, or is it the players who find things to complain about despite playing, arguably, one of the best free browser games available.