I’ve heard that most companies actually encourage you to use any throw that you feel good with but it’s an unspoken rule that you compete with their products out of respect. What would you have thought if Jensen Kimmitt had won the worlds with a Duncan while working at YYF?
Yes. You can use other yoyos. But if you’re competing or making a video, you must use your sponsored company’s yoyo. Unless of course you are sponsored by a site. Then I’m pretty sure you can use whatever you want.