This was in the 40KCS thread, but it gre too fast... This is an Idea for both 40KTD and foKCS
Make the Banking give SLIGHTLY more if you leave cash in. So, say someone puts 100 in. it gives them the credit at the end of round. But, if they leave it in, they get slightly more. I use autobanking all the time, but if there was this, I might be tempted to actually use the banking system to save...
Triggerwise, say you currently have a bankcash variable. Just before the -autodeposit command is executed, it moves all of bankcash into a new one, something like bankcash2. But just before that it moves bankcash2 into something like bankcashsave. so, bankcash is cash just put in, bankcash2 is cash that might go into saving, and bankcashsave is the actuall savings.
Using that you have to leave the cash in at least one full round. If you try to take out cash, first it will try to take it from bankcash, and then bankcash2. But if it cant get enough from those two, it will move the ENTIRE contents of bankcashsave into bankcash. So the longer you let it save, the more you can get. But if you try to use a single cent of bankcashsave, you loose the entire savings boost for at least one more round... which may make a difference...
If you want me to try to explain in a way that doesnt confuse people (including me) just ask....