No it definitely has a sudden increase after a few upgrades the cost after it's happened are:
810 for amount gained in auto gain,
and more importantly 600 for time decrease.
I've got more then 100,000 in just a couple mins.
i guess reduce the time decreased in the time decrease? should i do that?
idk.
If your not seeing it then it might be something on my end
i guess so , then i guess i should just do that if it is really easy to get alot of money. because i have no other idea on how to fix it