The tone of this article is really strange. It somehow sounds like the author is upset that someone forked his project. (There are several indicators of that throughout the post.) That's the whole point of free software. If you didn't want that, you shouldn't have chosen a free software license.

Also, as explained in other comments, it's unlikely this is actually a fork of curl. It's more likely it's just a wrapper around winhttp with a curl-like API.