Yes, I run Datum. It's modified only to the extent to save forwarded work shares. This is needed for accounting, distributing the rewards from Ocean to the miners. https://zappool.org/faq.html#what-block-template-is-used

GitHub

GitHub - zappool/datum-gateway-hooked: Fork of Ocean's DATUM gateway, with a hook

Fork of Ocean's DATUM gateway, with a hook. Contribute to zappool/datum-gateway-hooked development by creating an account on GitHub.