https://www.reuters.com/article/us-uber-ipo/uber-reveals-91-million-users-but-cautions-on-profitability-in-ipo-filing-idUSKCN1RN2SK >Uber Technologies Inc on Thursday revealed its initial public offering (IPO) filing, saying more than 90 million riders used the service worldwide while warning it may never make a profit due to pressure from rivals.