Pay day loans and pure cash

The assumptions, again, endpoint credit risk is priced at zero cost.  If someone is running severely red, they have high probability of negative cash balances.  The pit don't care, but card IDs in that color will have an S&L running very imprecisely,and the traders have to maintain a high allowance for bit error. Running red means the pricing ring is imprecise.  Inventory flow is imprecise because running red means your personal inventory is unstable, hence a lot of short term purchases without price comparison.

The bots don't care, they can adapt if enough people run red.  But the S&L is managing price in something like an open barter market, not much of a supply chain can be seen. Running red is not necessarily bad, you just do not have a supply chain backing you up.