Adding an anecdote I've heard, supposedly these tips and charity options are in some cases being used to test price sensitivity in the market. If your coffee wa

Adding an anecdote I've heard, supposedly these tips and charity options are in some cases being used to test price sensitivity in the market. If your coffee was $5 and that saturated your purchasing power, you wont tip or donate. But if you have additional purchasing power untapped you are more likely to, or more likely to choose a higher than average amount. This data helps the business create a price curve that allows them to increase prices without fear of lower demand. Something to consider the next time you tip electronically. I don't think the data collection game is viable with cash, even the IRS cannot keep on top of it.