(Reuters) - Amazon.com Inc on Thursday trounced first-quarter profit estimates on soaring demand for its cloud and advertising services, but forecast second-quarter revenue largely below expectations.Net sales rose 17 percent to $59.70 billion, beating the analysts' average estimate of $59.65 billion.The company forecast net sales of between $59.5 billion and $63.5 billion for the second quarter, the midpoint of which was below analysts' average estimate of $62.37 billion, according to IBES data..