If there are warnings and additional charges, that's not a soft cap. A soft cap is a cap which is applied loosely and on a case by case basis to the most data hungry of users. In example, even after the introduction of the 250GB soft cap, I was still doing 300-400GB combined per month of data transfer. But you'll note that in many instances, it was the persons doing in excess of 1TB a month who were receiving warnings for their data transfer.
