There was a band from Oldham on it a couple of years back. They said once they got through the auditions they had to sign a deal to give 15% of their income for all gigs booked in for the next 2 years over to Cowells production company. They eventually refused and didn't progress to the live semi finals. Daliso Chaponda ( Malawi comedian who finished in the final) had a similar contract which he was happy to accept because of the national exposure. He's now doing Radio 4 stuff and a lot of corporate gigs so probably a good deal for him