Yes it is in the cloud but if you use Gitlab you're suddenly compatible with hosting your own Gitlab. If you use Github you're not. Unless you pay tons of money

Yes it is in the cloud but if you use Gitlab you're suddenly compatible with hosting your own Gitlab. If you use Github you're not. Unless you pay tons of money for Github Enterprise. So there are Cloud services that make more sense to use in the long run, in this case Gitlab is one of them.