Which AWS pricing benefit means that the more AWS services you use across your organization, the greater the volume discounts you receive on some services?
Tiered pricing rewards higher usage volumes with lower per-unit costs — e.g., S3 charges less per GB as monthly storage crosses higher tier thresholds.
Why this answer
Tiered volume pricing discounts reward customers with lower per-unit costs as their usage volume increases across multiple services. This is a built-in AWS pricing model where the more you use, the more you save, without requiring any upfront commitment or reservation.
Exam trap
The trap here is that candidates often confuse tiered volume pricing with Savings Plans, but Savings Plans require a specific commitment amount and are limited to compute services, whereas tiered volume pricing is automatic and applies to a broader set of services without any upfront commitment.
How to eliminate wrong answers
Option A is wrong because Reserved Instance discounts apply only to specific EC2 instance families and require a 1- or 3-year commitment, not a volume-based discount across services. Option C is wrong because Spot Instance savings come from bidding on unused EC2 capacity and are subject to interruption, not from aggregate usage volume across the organization. Option D is wrong because Savings Plans commitment discounts require a consistent usage commitment (measured in $/hour) for 1 or 3 years, and they apply to a specific compute family, not as a volume-based discount across all services.