Not really although you probably need to use quite a bit of traffic before it becomes a problem. Your example of personal use only seems fine. There was a post

Not really although you probably need to use quite a bit of traffic before it becomes a problem. Your example of personal use only seems fine. There was a post here a while ago (that I cannot find anymore) about the devs of a package manager of sorts who were asked kindly by Github to do something about their excessive data usage. So it's probably not a good idea to build a company on it.