That's how much population you need to have in your city to be ranked as one of the top 400 cities and share daily HIVE rewards from the dCITY's reward pool.
I remember when 2000 population was enough, but as more users are starting to play the game it's only going to get harder and more difficult to stay in the top. It's a nice achievement, but is it even useful?
To fight for your position you will always have to buy more cards or start the events every 4 days. The truth is that the HIVE rewards from being in the leaderboard are truly amazing only if your rank is 100 or better.
There are players not even in the top 400 that have SIM income much bigger than some of the players in the leaderboard so I think in the end they are doing much better!
It's probably wise to copy the strategy of those players. In a few hours I am able to start all the dCITY events again, but I am not going to do it. From now on I will only keep on increasing the education in my city to finally discover more technologies.
What about you?