Online deals firm Groupon, valued at $20bn despite analysts’ scepticism, revises IPO filing after initially ignoring high costs Groupon, the loss-making daily deals website, has abandoned an unusual accounting method in its initial public offering (IPO) documents after intense scrutiny from US regulators. In an amended registration document filed with the US securities and exchange commission on Wednesday, Groupon said it had dropped a controversial metric that eliminated its substantial marketing and subscriber-acquisition costs.