Set it up so that it also runs at a randomized interval within a range so that it not only looks less uniform and more realistic but it also keeps you somewhere solidly in the middle of the pack, and it should be fairly hard to pick out as abnormal activity while still burning credits.

The damage will still be done, but it will be far enough down the line that by the time they need to figure out what happened, you’ll be in the clear. By then, they should be looking at the cost of AI as a whole, not each individual employee’s usage costs.