I know my question is similar to other topic as mentioned in title but there are few points that I would like to clarify:
My Scenario: I have created an APP and it uses REST API functionality. currently this app is in AppExchange and it cleared the review check.
Issue : My customer which are having professional edition is facing few issue and they are getting "insufficient access" issue . and Customers which are having other edition are able to work fine with my app.
Question : Is it that if I submit a case with salesforce as mentioned in other question (Present with Title), and once the REST API is enabled by Salesforce then all my customer of professional Edition will be able be to work fine with my App and they would not get any issue such as "insufficient Access".
Please clarify once again.