I don't buy magazines but my best friend reads all of them - th trashier the better and she's a well-read, well-travelled, cultured clinical psychologist who is the most switched on, intelligent person I know.
She doesn't watch BB or GS though so wouldn't buy specifically for them but she does like to keep abreast of the zelebrity world.
I'm not sure there's a type. Just some like those mags, some don't. No point me reading them - I wouldn't know who most of the celebs were. Lewnie and the like are a curiosity to some.
I used to be partial to those My Toothless Husband Ran Off With My Psychic's Mum's Cousin From The Chip Shop true story mags though but my dentist has gone posh so have upgraded their waiting room material so haven't read a magazine in years.