A couple of things to clear up here - firstly Poundland sell a lot of other products than triangle shaped chocolate bars, that isn't their primary business. Secondly they haven't gone to the wall at all. Are you maybe thinking of Poundworld? https://www.bbc.co.uk/news/business-44891786coincidental their competitor's just gone to the wall - ill omen.
but distributing air in cardboard boxes was not efficient ... unless it's an apple ?