"Estimated Actual completion time" is extremely inaccurate.

[ghost]

Estimated Actual completion time seems like a great feature, but fails horribly at its job. Purchases that will most likely, without golden cookie interference, take hours or days will be reduced to mere minutes, a few seconds. A screenshot is attached.

[5h3i1ah]

If you turn the option that shows 100% to 0%, as having it at 100% makes the calculations include GCs. It's reduced to minutes because GC really do make purchases affordable in a very tiny fraction of the time. While it may be severely inaccurate if you were to actually test it, doing the math would prove the estimate to be very accurate, and since FC uses math to determine this time, it can be absurdly low.