Some googling shows ~20 million software developers around the world. Some googling shows roughly 2 billion households globally and 50% of them have a PC in their household. So let’s say 1 billion PC users.

20 million / 1 billion = 2%

So yes, it seems like a small market relatively.

Remember Steve Ballmer?

Developers are incredibly important for an ecosystem and having them a bit more optimistic about a platform can be quite beneficial (for a very low price, even).

They were a significant portion of getting OSX to the masses, but became less and less relevant to Apple over time.

Just an FYI, 1Password can now manage ssh keys that you can authenticate with TouchID