If you're a developer, then this means that your apps will need to earn $50 before BlackBerry will release the funds to you. I thought that BlackBerry were already doing this, but it seems that this is a new
Any payments through carrier billing that are handled by Bango and Digital River will be unaffected by this change.
Here's the official info:
Note that vendors that earn more than $50USD during the month will not be impacted by this change and will receive regular monthly vendor payment as usual. Also note that this change applies only to payment transactions handled by BlackBerry Commerce. It does not change anything for transactions performed by Bango or Digital River.