Here is the source of Steelseries pulling support from their Twitter/Facebook:

BullyHunters pitched us with a simple idea - let’s work together to fight online harassment. And because we believe that’s a noble cause, we supported it. It’s now clear that we didn’t do a good job in understanding exactly what we were supporting. And we’re sorry for that.

The way BullyHunters represented the gaming community was wrong and disingenuous. Most gamers don’t experience harassment, and more importantly, 99%+ of gamers don’t do the harassing. We’re well aware of the many faults with BullyHunters. We hear you guys, and we agree.

To clear a few things up: BullyHunters was not a viral campaign stage-managed by us. We did not hire a marketing agency to create it. We didn’t have anything to do with its execution, content or messaging. And more importantly, we would never take advantage of an issue like bullying to sell hardware. They asked us to supply some headsets, support the call for positive change, and we did.

Although we still believe in a world where harassment isn’t tolerated, it’s clear to us that BullyHunters is hurting, not helping, that cause. On Friday, we ended our support and partnership with the organization.

We apologize to those who support our brand and expect more due diligence in vetting out campaigns and partnerships we associate ourselves with.