In the mid-2000s, Stan Lee cited Sinnott as the company's most in-demand inker, saying jocularly, "used to hurl all sorts of dire threats at me if I didn't make certain that Joe, and only Joe, inked their pages. I knew I couldn't satisfy everyone and I had to save the very most important strips for [him. To most pencilers, having Joe Sinnott ink their artwork was tantamount to grabbing the brass ring." Sinnott's art appeared on two US Postal Service commemorative stamps in 2007, and he continued to ink "The Amazing Spider-Man" Sunday comic strip until his retirement in 2019.