Even if only half of those employees were working on the actual product and product-adjacent roles, it still seems hard to come up with 4500 jobs. In fact I think the number of employees might be what led to a bunch of their missteps over the past many years. Like the multiple interface redesigns that no one asked for and actively disliked.

Yeah, I could imagine their legal department actually making up a sizeable chunk, with how much the music industry loves to sue.

Let's imagine we have massive departments for each one of those, like 300 people average for each of your example areas. For me it's insane just thinking about it considering what the product actually is. I'm still left with 7200 people unaccounted for.