It's obviously a pretty good marketing tool.... 
The contestants are no doubt carefully selected (or being put forward by their agents) for both enterainment values as well as commercial ones.
I could see for instance why the BBC wanted Christine Bleakley to take part last season although her ever growing popularity backfired on them in the end.
So, just for a bit of fun: who's in it for what?

The contestants are no doubt carefully selected (or being put forward by their agents) for both enterainment values as well as commercial ones.
I could see for instance why the BBC wanted Christine Bleakley to take part last season although her ever growing popularity backfired on them in the end.
So, just for a bit of fun: who's in it for what?
) who isn't interested in the popularity it'll bring them.