We are crushing it in DCITY!! Today we scored the top rank!
This is not an easy feat, as 
Thus why today we will take a picture, it will last a lot longer than our actual lead....
In fact, as I check now, we are already back in second place, less than 1 hour later.
You might have noticed that many of the top cities are using the 'zero income strategy'. This is fully dedicated to population and popularity growth, with no regard whatsoever for SIM income or social costs.
Yes, there is the 'Luxury Tax', which makes the actual rewards payout 30% less than it appears in the ranking screen. Instead of 225 hive, we received:
So in this way, it is very good that the top cities are zero income, as it helps the reward pool deplete less quickly. There are only 3 cities with SIM income left in the top 10, how long before we boot them out completely with this strategy? The OG Mighty Volcano is about to fall from top 10, but it will take much longer for current president D-Pend to fall from grace, especially with the current zero income cities competing with each other for the cheap basic homes, apartments and parks.
Taking a look at the cityhelper estimates, we can see that our zero income city is valued at just under 14,000 hive.
At a current market price of 0.00495 for SIM, and an estimated valuation based on the market for the last 30 days of 2791561 SIM, the exact estimated value is = 13818.227 hive
Considering that we can receive second place rewards of about 123 hive per day right now (after the 30% luxury tax), when we divide we get
13818.227 / 123 = ~112/113 day ROI
The Zero SIM strategy is competetive ROI with the SIM strategy!!! (ceterus paribus, but with no taxes to calculate and a growing reward pool, you do your own math)