That's not the point. The point is that if the customer and SAAS provider "happen to" be in the same cloud then nobody pays any egress costs, but if the provider operated out of their own datacenter then the customer would pay additional egress costs to AWS to export their data to the SAAS provider. Snowflake is a good example because by the nature of the business customers send them a lot of data. This not only makes the customer pay more, but it also makes their billing and cost accounting much more complicated and unpredictable.