Yesterday the miraculous happened! A shiny new DYSON SPHERE technology card was mined into existance - only the 2nd one ever! This priceless treasure is worth a lot to DCITY players who have many Solar Panels.
And this very rare and very valuable tech was mined in our sister city of 
Technology in DCity is a very clever mechanism. Players can use SIM tokens to unlock different levels of tech, and once unlocked, these technologies can be mined as cards (tokens). These technology cards can have powerful effects in the game for the players. The probability mining in the game is limited, making these technologies incredibly rare right now in the beginning of the game.
In fact, no Tier 5 technology has even been discovered yet!!!
So it was our surprise when yesterday it was discovered one of the best Tier 4 tech. There is a better card, so rare and potentially game changing in income, that was earned by BEARBEAR, which is the BTC mining level tech. Rumors have it that Bearbear made a deal with the top player to split the income bonus brought out by the card (which we estimate to be near 20 HIVE worth of SIM per day in the top city of @TheMightyVolcano).
We considered setting up a Solar Plant adoption facility. A script which would detect who sends solar panels, and share the increased income with them. If a solar panel produced 5 income normally, each solar panel a user sends to us could share 7 or 8 SIM income daily. The rest would be profit, and to cover for the optimization problem when we reach high popularities.
But that seemed like a lot of work yesterday, so we decided to see if anyone was interested at 288 hive.
Not even for one full day did this rare and potentious technology stay on the market. It was sold and, after the 5% fee taken by the market, we recouped a handsome profit, leading us to think -
If only we could mine more rare tech!!
To remember, technology mining is determined by the Education Score.
In order to participate in mining, you must have at least one Research Lab card, but after that, University, School, Laboratory and Scientist cards can all add to your percentage. There is a maximum cap of 25% daily chance to discover a tech.
But just making a discovery isn't the whole story! Once a discovery is made (maximum 25% chance each day), there is a probability table to check which tier the tech will be from, as shown here:
It seems that Tier 1 technologies are destined to be abundant, while Tier 5 may continue to be extremely rare for a long time to come. Could this be another potentially profitable strategy when playing Dcity for the lucky amongst us? It turned out that way for us yesterday!
This is not advice, it is History. Always do your own Homework.