Several of the distinctions in the poll are not necessary.
As it has been defined, and generally accepted, in the hobby since its genesis in the 60s, an appearance is in the context of a story.
This makes sense, because comic books...or "sequential art" as Will Eisner called it....is a graphic (that is, pictorial) storytelling (that is, conveys or transmits a narrative via those pictures) artform.
Promos, ads, pinups, previews of non-original comic pages, articles about upcoming characters...none of those has historically been considered appearances.
And this has been applicable since the beginning of comics, or Action Comics #12 would be called "the first appearance of Batman."
It is not.
"But...that's how someone ELSE chose to define it. It doesn't HAVE to be defined that way!"
True.
But the reason it was defined that way is because of what comics are, and trying to redefine it would alter decades of precedence and common sense.
Does that mean these previews, pinups, promos, ads, and whatnot aren't historically interesting, and can (and do!) have value of their own?
Of course not.
It simply means that those examples aren't "first appearances."
Dialogue, no dialogue, cover appearance, no cover appearance, one page, multiple pages...all meaningless distinctions.
Show me an example of sequential art...even just a single page, with a mere two panels...that has the first depiction of that character, and is not merely a preview of a page destined for another book...and I'll gladly stand with you and call it a "first appearance."
Otherwise...I'll stand with generations of collectors who have come before me and you.