Discrepancy in reported repository count between admin and non-admin users

Created by: beyang

Reported by https://app.hubspot.com/contacts/2762526/company/554338610.

Repro:

• Visit /explore as a normal user and admin user
• In the “Repositories" section, a normal user just sees 4 repos and doesn't see the "view all" link at the bottom:
• An admin user sees the link, and can click to see all 7 repositories

No repository permissions have been configured on this instance.