Even broader pre-purchase pricing model support
Orb's pre-purchase ledger is used to support burn-down use cases, where each event depletes a credit or real-currency balance; after a customer's balance is completely depleted, charges begin to accrue on the upcoming invoice.
Previously, Orb's pre-purchase system supported "simple" unit prices, where each event could be priced independently of others (such as $0.003 per event). As of today, Orb supports the large majority of pricing models in the pre-purchase ledger — as long as more usage for your model always means a higher deduction rate, the pre-purchase ledger can now track it! This is true of all default pricing models in Orb except for bulk pricing, where new events can lead to a lower overall deduction amount.
To learn more about configuring prepaid credits, check out the docs here.