It was indeed very often fixed (I think at one show that was being televised, the fans choice was "@#$%&" but they bottled it and played something else instead (I think it was 'Waiting on a Friend' which would have been prearranged as Redman was guesting)
That, plus the cybervote was open to being flooded with repeat requests.
It was, in theory, a novel idea though.
If they bring it back, they'd probably charge you to vote anyway!