PostgreSQL is an open source database. I guess that they like databases and understand when they can be useful.
But PostgreSQL has no bug tracker. Patches must be sent to mailing lists. Bugs are sent to a mailing list, apparently via a web-form, and some bugs are listed on a page, apparently written by a person.
Want to see what bugs are open and what’s happening to them? Can’t. Want to see what’s the current status of your patch? Can’t.