Not a subscription you hope to grow into. A share of a saving that already landed on your provider's invoice, and nothing if it did not.
Compute is what it costs us to process your payload. It is small and always owed. The savings share is a fraction of what you saved, and only exists when there is a saving to share.
Metered against what you actually send. This is the cost of the work, not a platform fee, and it is charged whether or not the reduction found much to remove.
A percentage of the difference on your provider invoice. No saving, no share. Your tier decides how the difference is split.
Higher tiers cost more monthly and return a larger share of every dollar saved. Heavier usage makes the trade obvious; light usage should stay on Starter.
The savings share plus the subscription is capped at the saving itself. Compute is always owed because it is real money spent on your behalf, but you will not be invoiced into a net loss.
And if your provider cuts their prices, your bill goes down with theirs. Savings are settled at the lower of the rate we recorded and the rate in force.
Preview accounts run against real traffic and are not billed.