Must be OP trying to hide it, Toggl displayed it proudly. The author used to work for Toggl marketing and ask can be seen from this post, did an excellent job. He still has a webcomic, it's just not marketing for Toggl anymore. Here it is

As for bias - it's a time tracking tool, but I don't think they actually shill for waterfall, I think it's just poking fun at the agile methodologies.