两个英语句子,求分析One of the most popular pastimes today is movie-go

两个英语句子,求分析
One of the most popular pastimes today is movie-going.With what started as moving-picture shows has dramatically developed into an industry that spends millions upon millons of dollars while still turning gigantic profit.
从With what started as ……到最后,为什么这句没主语呢?
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Movies are definitely more appealing than for audiences who have exhausted themselves in the real world than are(这个are是什么情况?) those printed novel.