GitLab's [chatops](https://docs.gitlab.com/ee/ci/chatops/) functionality makes use of GitLab CI and [Slack slash command service](https://docs.gitlab.com/ee/user/project/integrations/slack_slash_commands.html). However, on GitLab.com, Slack slash command service is disabled in favor of [Slack application](https://docs.gitlab.com/ee/user/project/integrations/gitlab_slack_application.html) (which exposes a pre-defined `/gitlab` command only). This means users and customers of GitLab.com can not use ChatOps or custom slack slash commands. This doesn't seems intentional and feels like a bug. PS: Even though the slack slash command service is not listed in the project integrations page on GitLab.com, it is directly accessible via its URL at `<project>/-/services/slack_slash_commands/edit`. However, this is more of an oversight/bug in the original replacement logic rather than a workaround.