Can’t believe the shutter wasn’t mentioned until the 6th response to this thread.
Even if you’re not into it because it isn’t collectible or premium, you’ve GOT to acknowledge its influence.
Not only in bringing about the budget mono-metal, but also in bringing new kids into the sport.
Gentry’s well choreographed and appealing performances (sometimes topping 1,000,000 YouTube views) combined with the advertised fact that “you can get the exact same yo-yo that he used for less than $50” is a one-two marketing punch that successfully pulled in previously unheard of amounts of new throwers.
And if you think about it, this “shutter success” is really only could have happened with the chance intersection of a player like Gentry and a (comparatively) larger company like Yoyofactory.
Of pretty much all the yoyoers out there, Gentry is the one who makes it look the best to skeptical non throwers. Let’s be real, when most people hear the words “yo-yo competition” they picture a bunch of pasty and skinny dudes who don’t touch grass enough. And to a large extent, they’re right.
Gentry breaks that mold. He looks like a cool dude with good hair, that probably plays basketball, and definitely has a girlfriend. And that, combined with the best stage presence and music use in the game, leads to views. It leads to young kids in wanting to get into yoyoing, more than any Takeshi Matsuura performance ever will. I don’t care how good his tech is. Yoyoers that look like popular high school kids don’t come around often. Honestly, I can’t think of many others.
So this performer, combined with a larger company that can churn out and sell (quite literally) hundreds of thousands of units meant that the Shutter was a perfect storm, and is almost certainly the competition yoyo that has brought the most people into the hobby.
So yeah, I get where people are coming from when posting about different ILYY models and the One Drop M1, etc…. on this thread.
While I do understand that this thread can mean different things to different people, and not everyone interprets the prompt as “biggest impact across the globe” and I did, the fact that the One Drop Panorama was mentioned before the Shutter is CRAZY in my book. C’mon forum dudes…. 
And to be fair, I’m not saying the Shutter the greatest yo-yo (although I think it’s way better than it gets credit for on the forums), or that Gentry is the best player, BUT, if you’re talking about worldwide influence, the Shutter is in a tier of its own.