I thought they moved out because they were having difficulty getting penetration?

Today you learned: even though you think Google is "out" of China, the borders and labels displayed in Google Maps still change if viewed from within China (and for many other countries, too, depending on their stances in territorial disputes):

https://www.youtube.com/watch?v=q9ZMub2UrKU

Google had a (rightful) chip on their shoulder after they discovered Gmail had been targeted and hacked by the Chinese government.

Still I think it would have been better for Chinese citizens if Google had found a way to continue operating in China, even if partially censored. It's not good for humanity when the largest country in the world becomes increasingly inwards-directed.