Thank you for the reply Kaniz.
Can you please elaborate regarding the following:

• When did DB replaced 3.0 with 3.1?
• How was it communicated to paying clients? I don't recall any email alerting us about the coming change.
• Is there any rate difference between 3.0 and 3.1?
• We're still using 3.0 endpoint URL. I assume there's an internal re-direct to route requests to 3.1 models. When would we need to update the URL or will DB continue to re-direct our calls?