Zuora’s recent Subscribed user conference was a good first outing since the company’s IPO, coming off some impressive first-quarter results. Year-over-year subscription revenues grew 39 percent and total revenue grew an amazing 60 percent, for example. As good as its present situation is, now that Zuora is a public company, it has to push down the gas pedal to feed the insatiable stock market. It has responded to that need with several interesting introductions that further build out its product line.