How do message overage buckets work?

Mosio’s plans include a set number of outbound message credits (aka "segments") that are shared across all your projects/text lines, roll over month to month, and accumulate over the full license period (e.g. a Basic plan over 12 months yields 36,000 credits).

 Inbound messages are free and do not count against your credit balance. If you need more outbound messages, you can purchase additional "overage bucket" credits in increments of 5,000 for $99, which are credited to your account for the duration of your license. There are no refunds for unused credits, so pay as you go, using the online ordering system under Extras.

Additional Outbound Messages (per 5,000)
– Credited to account for length of license.
– Inbound messages are free.
– Messages and Segments

Purchase additional message buckets.