So do Seymour Duncan, honestly.
They have the JB, JB Antiquity, JB Rails, Thrash Factor, Dave Mustaine Livewire, Alex Skolnick, RTM, Distortion, Black Winter, Invader, all variations on the JB recipee in one way or another.
Then they have like 10 or 15 other models based on the PAF.
Not saying that's a bad thing. And I'm not even defending DiMarzio. I also prefer Duncans. But having a lot of models isn't really a bad thing, I think.
JMO.