For most of the game i played with the Corporate Branding strategy. As expected (from the manual and online sources), brand loyalty went negative when i was selling 10+ products across 4 classes. It went down to about -23.
Since i wanted to expand my product range i decided to switch to Range Branding, expecting the brand loyalty penalty to be much lower. But after raising brand awareness again, i saw to my surprise that my brand loyalty (for computer products) was even lower than before, around -35.
My products all had high quality (70+) and a high overall rating (60+). So now i'd really like to know, how is brand loyalty supposed to behave under the various branding strategies?