Here, it's more like losing access to the amount of that is above $250k for some time, and maybe losing 5-40% of that amount forever. So, (0.1 * x - 250000) *

Here, it's more like losing access to the amount of that is above $250k for some time, and maybe losing 5-40% of that amount forever. So, (0.1 * x - 250000) * 0.4. So if you use IntraFi to place across 10 banks, and you have $10M, maybe you lose $300k. It is a risk... but there's plenty of ways to lose a few percent of your working capital that are out of your control. If you want to further reduce the risk, you could do additional things (e.g. buy some T-bills).