Please then explain why Super Saver was retired?
Well, it was retired because Bob screwed up the rules, but he was notified of it and it affected the game differently than the MYM mess up. That mess up in MYM ended up giving the contestant more than they deserved, while the Super Saver incident disadvantaged the player since they were under the assumption that they could no longer win after finding the marked up product.
In addition, Drew shares no hand in the final say of how the show is run (and especially not back then). That's not to say that his suggestions and concerns aren't taken under legitimate advisement, but more to say that he is not the Executive Producer of the show. Bob was, and he figured that if he could mess up so easily and potentially cost the show $2K+ in a prize package each time, it was best not to keep Super Saver around. Disappointed in his decision, it's a fun game and a lot games that should be simple can be bungled by anybody.