Yeah. I know. My wife used to be in research sales. I had several trading roles within a major bank. The revenue you described falls under sales and trading. How it gets split between a trader, sales trader, research sales man, and research analyst is a political struggle. And all four of those guys are generally paid out of sales and trading income.
Rephrasing: There is no other way to quote forex profitably without getting run over. It's algos or die.
Where do the giant companies get multi-billion dollars for trading? They can move the markets from investors money. This is the reason Gold and Silver price is not going sky-high.