I can't understand why they would have Revenue and Net Income on the same graph.
Revenue, often classed of as core-business ONLY gross income - ie gross income figures restricted to income generated by companies registered description.
Gross Income is income which includes ancillary income, like investments, capital gain and what have you.
Net Income is ALL the companies income after tax.
So to me the chosen axis of this graph is to obfuscate secondary income and deliberately make the net income look less - why ?