At the beginning of Mumbai Concert they started the voting line and asked to vote without even seeing the performances !!!!
I agree Finalists have fan following and they will vote for them but there are a lot of people who are looking for a good competition and they want to see their final performances and then vote.
Also there were too many distractions for Amit and Prashant while giving their performances. Prashant had the advantage of going second. Comeon it was the final performance they should have given the chance to concentrate. Not involve them the film promotion of "Goal" at that crucial stage.
Sony made the fun of Indian Idol competition just to earn more money.