Copr just got 800 GB of disk space (big kudos goes to nirik).
Little disadvantage is that it is just single disk. No mirrors, no back up.
But I think we can go public even with that.
I migrated all data (1.75 GB so far) there already.
I will do tomorrow some final checkings and write some nice HOW-TO with
screenshots and then I will publicly announce it on fedora-devel. My ETA
is tomorrow or day after.
I installed new version on http://copr-fe.cloud.fedoraproject.org
It contains several UX improvements.
And repo files are now generated per chroot (so you do not get fedora
versions on epel etc.).