In fact, what we suppose to offer is 1. for new subscriber (exclude certain user group say group A users - note: they are new subscriber), will has free trial and then normal subscription price. 2. for group A users, if within promotion period, will has discounted subscription price, otherwise will treat as new subscriber that has free trial and then normal subscription price. Base on this offer requirement, we choose to use introductory offer + offer code. However, as offer code can't test in sandbox and so we are not sure what is the exact flow of it and our implementation idea is work. That's why ask here. We do think about fire DTS and ask our question there, but it requires a project ready to illustrate the issue which is not suitable for our question.
