I receive a question around Administrator-approved InfoPath form templates. Here is the answer.
Q. Haaron, what really happen when we upload a new version of an InfoPath form in central admin?
A. When you upload an InfoPath form template using SharePoint Central Administration some things happen:
1. In Manage Form Template you can provision the same version of the form in more than one Site Collection, you can manage the form, activate or deactivate.
2. It creates a WSP file based on your InfoPath Form Template version and deploys as a farm solution, automatically creates a Site Collection Feature that you can Activate or Deactivate.
3. In Manage Form Templates page, when we Activate To a Site Collection basically activate a Site Collection Feature in the target Site Collection, and that provision the form in the Form Templates library.
4. Behind the scenes, when the WSP is generated SharePoint maintain a version of the form template. That make sense because forms instances can point to older version of the template
And this behavior is the same for MOSS 2007, SharePoint Server 2010 Enterprise and SharePoint Server 2013 Enterprise.