I don't mean to sound rude Shopperholic, but 'the Bid losers' as you are calling them are being allowed to get away with the mis-selling and awful tactics, IW easily have the power to stop a presenter saying anything they want, by simply stopping them going on air. I do hate this approach that the bid crew are satan himself with poor old IW just innocent bystanders, as you said "IW would be my perfect shopping channel" if they left. If IW wanted to crack down on PS doing the naughty stuff, they would have warned him once, waved P45 second time and he wouldn't have done it again, so by my way of thinking they are clearly either ok with it entirely, or encouraging it.
IW are not as innocent as you may think, I have brought up the issue of Linda Lusardi and her 'work' at a clinic, and the fact she STILL doesn't mention it and alludes to the 'no-work' done line of schpeel, but despite her doing this on THEIR channel, they just tell me to ask Linda herself.