Maybe some truth there, but again, the vote was probably rigged by phone freaks, meaning Jason wasn't voted dead to begin with. And then there were Jason fansites and fan fiction and Jason sold a lot of comics when he returned (how did anyone know who he was enough to drum up such sudden popularity?). And I disagree that they didn't and don't know about Jason's Robin years. Jason fans seem to know a lot about him.
In my experience, all those early post-COIE Batman stories are pretty popular, like Byrne's Superman era was...COIE's reboot drew people in. People were reading. And Jason was liked enough and remembered.