One of the things that small businesses need is the ability to allow other users to access certain portions of the Zoho administration without needing to be the portal owner. One of these is the integration with Projects and slack. I think it would be a good idea to allow the portal users to define who has access to integrations with other software. This will allow the portal user (who is usually the owner of the company) to give the permission to another person who might have the time to work on the implementation of the integrations without giving them full access to the site. Also since only one person can be portal owner. They will need to give this permission to someone else and then have it returned when the integration is completed.