Any incoming revenue, whether from sales or investment is theoretically taxable as income unless the company can show that it was used for an exemption such as an op-expense. This rule classifies dev salaries as cap-ex which have a different exemption process. “Profits” are just revenue minus expenses, the question is what is an expense. This rule classifies some expenses in a modified way that lowers the annual amount of the company’s expenses raising their tax liability.