I see a number of people that would maybe like to stay involved with the game, but it is truly difficult to find a good active fellowship for brand new players - and worse yet, you get 'start up' fellowships that go around and invite people and then basically abandon those new players into their fellowship morgues filled with mostly abandoned cities and little to no activity.
Also, I've just talked to a couple of people in the last few days that said they stopped playing because they got stuck early on.
And, the #1 complaint I hear from brand new to the game players is their frustration over not having enough land, and then if they stick with it a bit longer they get frustrated at not having enough population and culture and stress about having no land to upgrade the buildings to a larger size. Yes I realize this is all to 'encourage' people to buy diamonds - but even if people do buy diamonds to start with, they get sick of having to buy more and more and more and seeing the cost of expansions and builders going up so high.
I invited a friend that has played travian games with me for several years - he loved it at the start, but he ended up quitting because he said, and I quote: 'This game is a ***damned money pit' - that coming from a fellow who has faithfully spent money on gold memberships in countless travian games for years - he dumped a good bit of $$ onto this game, but quit over the cost increasing.