They never stopped what they were doing, they just started hiding it.

In 1882, Udall took a second wife, Ida Hunt, a granddaughter of Jefferson Hunt and also through her mother Lois Barnes Pratt, of Addison Pratt. That same year the U.S. Congress passed the Edmunds Act to aid in the prosecution of polygamists. Udall was indicted on charges of unlawful cohabitation in 1884. He was never convicted, because his second wife lived in another town, and prosecutors could not locate Ida to compel her testimony against him.

Flake

On December 5, 1884, Flake was tried Prescott, Arizona in the District Court and found guilty for practice of polygamy and unlawful cohabitation[6][11], a common charge used to prosecute LDS men under the Edmunds Act.[12] Flake received a $500 fine and was imprisoned in the Yuma Territorial Prison for six months.

Romney

A polygamist,[7][8] in the aftermath of the Edmunds Anti-Polygamy Act of 1882 (later amended by the Edmunds–Tucker Act, 1887), Romney, on April 7, 1885, joined a party leaving Arizona to find land outside the U.S., in the state of Chihuahua, Mexico, on which his family could settle, free from fear of his arrest.[9] Romney died on February 26, 1904, in Colonia Dublan, Mexico.

https://en.wikipedia.org/wiki/Miles_Park_Romney

https://en.wikipedia.org/wiki/William_J._Flake

https://en.wikipedia.org/wiki/David_King_Udall