Right now, it is indeed Ubisofts fault, because they can't adequately protect their own servers, that their customers are tethered to. The failure of those servers, regardless of what data is being sent to it, IS on Ubi's shoulders.
As for me, this is my only and final straw. I'll play this game (when i can
) since i have i, but i am not investing a single minute more in modding it. Any modder probably hits their login servers 5 X more then your average user. You have to because many adjustments made, you have to completely restart the game for them to take effect so you can gauge how their working. A modder needs to be able to get into the game, quickly, cleanly, and on demand. It's a time consuming process, and this DRM garbage makes even more time consuming. No thank you, the frustration is not worth it to me.