What does 冒了出来 mean here? 通过网络写作，很多年轻的写手冒了出来，然后重新回归到传统的出版方式出书，这是好事。

Many young writers emerge on the internet and later turn to more traditional forms of book publishing, which is a good thing.

I think 冒了出来 means 'emerge', but later it says '重新回归到传统的出版方式‘ If they emerged on the internet, they can't return to traditional book publishing, because they were never there.

If 冒出来 is 'emerge', I'd have to set 回归 not as 'return， regress' but 'turn to'， so maybe there is some other meaning for '冒出来‘ here？？
1 冒出来 literally means to pop up, to suddenly appear. In this context, it means to become popular. For example：最近几年冒出来了很多互联网公司，他们的增长速度让人吃惊。

2 回归  here it  means come back to former situation. For example: 他们的心情最终会回归平静的。