http://www.seanbaby.com/hostess/images/v2spiderman21.jpg (http://www.seanbaby.com/hostess/images/v2spiderman21.jpg)
I'm pretty certain this add was drawn by Frank Miller with Joe Rubenstein inks. What do other people think?
http://www.seanbaby.com/hostess.htm (http://www.seanbaby.com/hostess.htm)
I don't know... but those ads sure did distract me from my job for a solid hour!
It's hard to tell, but I think you may be right. The broken window in panel 2 does look kind of Miller-ish. Miller drew Spidey a few times (in Marvel Team-Up #100, and in a couple of Spidey Annuals)... I don't have the books handy, but if someone else does, you could compare the Spider-Man figures to see if they're similar.
Here's some more Hostess ads.
http://www.tomheroes.com/Comic%20Ads/hostess%20ads/hostess.htm
The first Spider-Man pose looks like Miller. As does panels 2 and 4. Also the pose in Panel 5.