Chatops can not be used with GitLab.com

GitLab's chatops functionality makes use of GitLab CI and Slack slash command service. However, on GitLab.com, Slack slash command service is disabled in favor of Slack application (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.