The bottom line of all the pay for ad mounting that goes around in the world, it would be really great to see how much profit it really returns, minus all the e

The bottom line of all the pay for ad mounting that goes around in the world, it would be really great to see how much profit it really returns, minus all the expenses... I've implemented ads on web sites before, and though they weren't high traffic sites, they still made thousands of hits every month and ad revenue was nowhere near the hours it too to implement and configure ads across them. Side revenue is a great thing when it works, but there are so many pyramid schemes when it comes to ride sharing, house sharing, office space sharing, scooter sharing and everything else, it's making me wonder if all the people that used to sell AMWAY and Tupperware are at the bottom of this one. Maybe I'm being cynical... But putting a billboard on top of my car for $300 a month doesn't justify the wear and tear to even a hooptie, and the damage it will do the one time I forget it's on and drive through an automated car wash. :/