Oh man. I almost unfollowed you immediately because of that joke.

What's the latency of this? Can it calculate g+ in real time? What's the delay?

Can you explain what Offensive/Defensive g+ is?

How do you calculate match momentum?

Where do you even watch it?

I wouldn't consider those soccer coaches -- they'd be 1-on-1 coaches who work individually with players. Or another way of putting it is: "Most soccer clubs operate using a pay-per-season model."

I'd bet most club soccer coaches work for clubs on stipends more or less and don't make much.