FIOS wasn't actually why that market segment died; it was due to the FCC decision to re-classify DSL [0]. This was in response to a lawsuit resolved a few months earlier that did the same for cable internet connections. [1]
By re-classifying both cable and DSL as Title 1, rather than Title 2, that meant that they were no longer common carriers, and could kick all the competing ISPs off their network. This is why it seemed that most of the third-party providers went away nearly overnight.
By re-classifying both cable and DSL as Title 1, rather than Title 2, that meant that they were no longer common carriers, and could kick all the competing ISPs off their network. This is why it seemed that most of the third-party providers went away nearly overnight.
[0]: https://www.cnet.com/news/fcc-changes-dsl-classification/
[1]" https://www.nytimes.com/2005/06/28/technology/cable-wins-int...