The prevailing skepticism about tech IPOs is that frothy valuations sans profits are contributing to a bubble. Yet King Digital Entertainment, maker of the highly addictive game Candy Crush Saga is one of the few big mobile companies posting hefty revenues and profits ahead of its own IPO. While rival games maker Zynga is booking losses and struggling to keep its shares aloft, King.com booked $568 million in profit, on sales of $1.8 billion in 2013.