Because DataDog's GitHub integration does in addition to git data also take GitHub data into account to provide a better user experience. E.g. for giving "this

Because DataDog's GitHub integration does in addition to git data also take GitHub data into account to provide a better user experience. E.g. for giving "this action broke this thing" insights giving you a clickable link to a GitHub PR instead of just providing you with a git SHA hash. They also provide a direct git integration, which as far as I can tell just is a reduced version of the GitHub one, with a featureset that seems reasonable if they only have the pure git data.