EPEL PLAYGROUND
EPEL Playground was shut down in January 2022
EPEL 8 Playground was a place that developers and maintainers could "play around" with updated, or changed packages in epel. EPEL Playground never really worked out and ended up being more burden than helpful.
If developers or maintainers want something similar to EPEL Playground we recommend Fedora COPR, which has availability for EPEL builds.