deleted previous bug report about income becoming drastically reduced the further you expand,
after some further testing, it appears the game is overworked, reducing in-game clock speed, and then is possibly reflected in stats as being a slower income,
comparing in-game time to system time, 1 game second = 12+/- real seconds.
the games browser tab draws 1.8g memory, or 1/10th of total ram at current expansion.
this makes more sense with the issue of 10+/- minute game freeze / load time whenever using "skip 5/10/15 minutes" or minimizing browser window