[left that other site]

A lot of the 19th century Writers “overwrote” because their books were often serialized in weekly publications.

Dickens, I am told, was paid by the WORD! LOL!

(That explains a LOT!)

[AnAmericanMother]

I'm sure it explains it to SOME extent, but not ALL - because Trollope and Wilkie Collins and Conan Doyle all wrote for the serial magazines . . .

One must have a heart of stone to read the death of Little Nell without laughing.
-- Oscar Wilde

[RansomOttawa]

A lot of the 19th century Writers “overwrote” because their books were often serialized in weekly publications.

Yep, and as you noted, they were often paid by the word, which is pretty strong motivation for more effusive prose.

A critical edition of Dickens' books will probably tell you where the breaks were between installments, but an observant reader can probably spot them. Oliver Twist, for example, has some pretty obvious cliffhangers.