Tablers face rejection 99% of the time. Some people keep walking and don't stop. Some look at your work, smile at your greeting, and keep moving. Some linger, check out your work, and leave anyway. That's fine, it's part of the job, and the 1% that stop and have a positive interaction, even if they don't buy anything, more than make up for everything else. That said, it's hard not to get frustrated when that 1% interaction hasn't happened in a while.
For those curious, the comic being read is one of my horror minicomics, The Man in Green. If you'd like a copy, please visit my store here.