I maintain that "you either love it or hate it" is the most ingeniously manipulative advertising slogan of all time.

It catches you off-guard. "Why are they admitting that many people hate their product?" While you're distracted by that, the real payload is dropped into your subconscious: "I don't hate Marmite - therefore I must love it". And the meme-like quality means that the false dichotomy is socially reinforced once in a while for good measure.

Marmite certainly has a distinctive taste, and many don't like it. But I doubt marmite preferences are really bimodal. When asked if I love or hate Marmite, I tend to say something like: "It's OK - Nice-ish". I have received reactions ranging from dumbfounded confusion to outright aggression.

Wake up sheeple!