Apple puts Apple first above all else, after which are customers and then developers.

Like most companies it's a question of who you perceive your customers to be:

Apple — end users

Google — advertisers

Microsoft — OEMs, IT departments (although they seem to be changing their mind about OEMs)

Amazon — investors (which bizarrely works to customer benefit, or at least low prices, right now)

That's cute, but also pretty clear that every category you've assigned here is inaccurate in any realistic sense.

Developers did have one huge effect on Apple: the creation of the iPhone OS SDK.

When the iPhone launched, Apple really did believe that they were going to limit developers to web apps on that platform. It was only after huge outcries from developers that they agreed to create an SDK.