The game would be better if you could let it run in the background when working on other tabs/screens. It's annoying that you must sit and look at the screen for progress to be made.
So there must be another bug in the game's math. To buy 303 Newspapers I need about 128 quintillion. To buy 320 Oil Rigs I need 61 quintillion. Most of the investments aside from lemonade stands appear to have this inverse ratio as well. Don't know if this is on purpose, but it feels off.