I am the elected "Developer" (committer) to Bitcoin Unlimited. I am breaking my silence of a year and a month on this forum to say that we do have a solid development team, but that you will have a very hard time discovering information about us and the Bitcoin Unlimited project on this forum since much of it has been "moderated" out of existence. We will see if this post lasts. Please do use Google searches to learn about us.
Nice to meet you, and thanks to franky1 for the technical explanations.
BU shows a risk, or an opportunity, that I hadn't seen coming. For months, we've talking that Bitcoin Core was slow to solve the scalability issue, and probably to their surprise, that opened a door to outsiders to come up with a solution of their own. So BU may have 15% of the hash rate, which is already huge, and I doubt they could ever gain 90%, but they add strong pressure to Bitcoin Core. Monero is a terrible example. One guy invented it, but some others seized it.