If you don't have the time or money to have actual menu photos taken, what are the odds you have the time and money to source high quality ingredients, keep the kitchen clean, or improve the taste of the food?

The minor details are precisely the ones that require the least time and money to handle, so if those are being skimped on, it's likely that the major details are too, in my experience.

It depends, probably. If we are talking about high end, off the beaten path places, marketing is important. For the $1.50 slice pizza at the hole in the wall in Times Square? I doubt those places are cleaned and no one is checking the reviews, people just line up because others are, and because the smell and taste is right.