Oh ok, I thought it was just a few days. Simulpub you just get the current chapter, the backlog is for Premium members
VIZ Media is only a US and Canada company, their main focused is US and Canada. Worldwide isn't their focused, because other companies have the copyright for the Anime and Manga they have.
I guess I'll end this with my favorite quote "It's the job of those at the top to decide what's good and what's evil! Right now, it could go either way! Justice will prevail?! Of course it will!! Because the side of justice will be whichever side wins!!"