By that logic, doesn't your lack of success with no advertisement or SEO on the first product prove your second and third products don't exist?
Adwords and SEO are extremely valuable and profitable when done well. Bear in mind that Bingo Card Creation is a relatively small niche. There are people doing finance related things with adwords who make millions.
I was suggesting that if the OP applied his own logic...
Personally I think making any amount of money is cool and something to build on.