Well I can tell you the Sketchy Stock Market isn't paying back the correct amount at least. I have auto mining going right now so it's hard for me to say how much it's off by but I started the previous round by being the first person investing, had it all "paid" and my current gold value looks like it could be arrived at entirely through my mining
Yes I am aware that there's an issue with the Sketchy investments, which is why they are still in the beta area.
I am working hard on resolving this problem, but so far I have been unable to both reproduce the error and read my way through the script to realize why it's not paying back every deposit.
To me, it seems like this issue is happening randomely, but I am still investigating the problem.