bugzilla.opensuse.org/page.cgi?id=glossary.html#cf_foundby has the option to choose “Customer”. Would any user of (Open)SUSE count as a customer in this case, or solely an entity paying for the enterprise version(s)?
I’d like to know so that I know whether to set the bugs that I report as found by a customer or to leave the field blank.
No need for you to fill this field as everything needed is described here
https://bugzilla.opensuse.org/page.cgi?id=bug-writing.html
and here
https://en.opensuse.org/openSUSE:How_to_Write_a_Good_Bugreport
The advanced editor is most likely for developers who already know what they are doing and if there is a business impact or something else for the SUSE versions…
All fields for normal users that are needed have a red star…
Although there’s no need,