setzer·قبل 15 سنة·discussThe total number of paying customers is what determines your revenue. But even then, it's important to track free->paid conversion percentages, e.g. sudden drop offs.
setzer·قبل 15 سنة·discussdiveintopython has also been rehosted -- I have this saved as a bookmark:http://www.diveintopython.net/
setzer·قبل 15 سنة·discussI'm probably going to get downvoted here, but they usually do not verify income (or anything really) for credit card applications in the US.(As a college student I just used my parents' incomes, using a broad interpretation of "household income")