I hadn't been seeing cash drops at the 90+%s pretty much ever until the last week or 2. I honestly think they messed with the %'s or the coding.
This is specific to west side and meat pack for me. I'm pretty sure slums in the 90%s I've seen cash drops but that was months ago. I don't know why they would tweak the %'s of the cash drops to be higher. No one needs raw cash and it takes forever to get good * Lt's.
I have never gotten cash (that I can remember) when taking any dice job to 100%, but I seem to be getting way too many recombinators dropping when taking the dice job to 100%. I have way more recombinators than I'll probably ever use.