It irritates me because this was the third time Misha has been in the bottom 2. If the public aren't liking her enough to vote for her, they aren't going to like her enough to buy her music. I mean, if winners who were never in the bottom 2 (Matt Cardle, Joe Mcelderry etc) struggle to sell albums, Misha will have no chance.
I don't think it's a conspiracy to get her to win, because it will never happen. But she is one of the better performers of a lacklustre lineup, so I think they want to keep her in as long as possible to keep the live shows watchable. I imagine she is a goner next weekend.