I think these hosting providers are trying to get people into the habit of doing pull requests, which is something base git and git flow doesn't cover. A lot of

I think these hosting providers are trying to get people into the habit of doing pull requests, which is something base git and git flow doesn't cover. A lot of small teams seem to rely on blind merges with, but as you grow you need better ways to comment/approve/deny changes that random team members might throw into a codebase.