[bobdole1234]

Since they're using it internally to make facebook work, I'd say it's a core product and a lot of engineering efforts are being expended to make the company run better.

It just also happens to be something you can sell to others too.

[JonDav]

Since you consider it a core product, what do you estimate the portion of Facebook's revenue comes from this core product in relation to the billions they receive elsewhere.

[bobdole1234]

I don't know, how much do you estimate any given road contributes to the GDP of the US?

It's infrastructure that enables the rest.