Provide the ability to make one-off purchases of additional text message credits, to supplement the number of credits that are automatically allotted each month.
This will be particularly helpful to communities who want to consistently send multiple blast text messages per month, thereby leaving few remaining credits to rollover from month-to-month (once this feature is released).
Currently, the only way to gain more text message credits would be to subscribe to a larger size, which isn't as cost-effective for most communities, and not possible if a community is already subscribed to the largest size.