I would like to pick up this topic again, maybe we should just involve support for it.
I have been able to confirm that "sfdc" is an accepted value for source and "salesforce.com" is not...
Did this behavior change over the years maybe?
The following list throws 0 results ("salesforce.com")
Whereas this list shows results ("sfdc")
I was trying to determine whether a change was made manually or automatically (using "is" or "is not" on "sfdc")
I have been able to confirm the following constraints: