The author is trying to sell a freemium product, its a gift insofar as Dropbox's 2 gigs are a gift. (EDIT: maybe the premium support is more to support this project than being the main objective. I don't mean to assume too much on motives)
Some small modifications to the text can make the messaging more friendly. For example "To report a bug, please create a pull request with a test case of your problem." (instead of "you have to")
It's a small change, but conveys the same requirements without conveying a notion that the reader is a burden. Instead it just asks a favor, since we're all humans talking to each other in good faith.
It seems small, it seems pedantic, but we're guided by our emotions. The fact that this thread exists is proof that it affected at least some people enough to comment about it