Upgrade Steal Rate rapidly becomes useless. It says that it increases the transfer between nodes per click. But this is only in effect when there is "extra" (more than the auto steal amount) outgoing money in the node. Clicking on the steal button increases the outgoing money temporarily. Outgoing money does not get transferred all at once. "Extra" outgoing money decreases per tick based on the steal upgrade. It's possible to bog down the game by stacking up a lot of extra outgoing money on a lot of nodes.
There appears to be a bug with the outgoing money. Or maybe it's just caused by the way Firefox works. Sometimes it increases per tick instead of decreases. This appears to be caused by the game losing focus when I alt tab to or back from a game. This bug continues on reload.