I would argue that this level of dedication would be within the top 1% of credit card users and that probably is beating the system. Product prices are increase

I would argue that this level of dedication would be within the top 1% of credit card users and that probably is beating the system. Product prices are increased, but since the price increase is spread out among everyone (including those who pay cash), it seems likely to me he makes a good return. Maybe not $/hr, though.