Companies tweak strategies as every product sold needs to have notional value in new tax regime There's no such thing as free pizza -or `free' anything -under GST, it would appear. That staple of promotional schemes among consumerfacing packaged products and foods services companies -buy one get one free -is being axed by many of them a month after the goods and services tax was rolled out. The move is necessitated by the GST fine print, according to which compa nies will have to pay additional tax on anything they give away as `free' to consumers and stand to lose input cre dit when they classify a product sale as `free'. That's forcing companies to look for other ways to win over customers. “We are doing away with buy-oneget-one-free offers and are switching to upfront discounting,“ said Mayank Shah, marketing head at biscuit maker Parle Products. “This is causing disruption but it's what is required under the goods and services tax.“ In a slowi