Their prices as spikeychris mentions are more than the leading supermarkets. Reports on the news is that this is a marketing ploy to make the consumer think they are geting a good deal and the "offer" was no mistake.
Are you saying that Asda's prices are lower than the Threshers special offer prices? That would mean that normaly, customers are paying at least 40% more to buy alcohol from Threshers, which I find hard to believe.
I also find it hard to believe that over a million people would bother to download the Thresher discount voucher if they were beng 'done' by a marketing ploy. Surely you aren't the only one who knows that Asda are cheaper?
You're right - there has been a good deal of talk about the offer not being quite as sensational as some people thought. I tried to do some price comparions last night, but of course I couldn't get onto the Threshers site - it crashed under the load of all those people downloading vouchers.