Jack Dorsey says the new rules will drive cryptocurrency users to use unregulated third-party wallets, including ones hosted outside the United States.
Jack Dorsey has been serving as chief executive since founding the social media platform in 2006.
The heads of Facebook, Twitter, and Google said changes to Section 230 could change how they moderate content.
Twitter says "a coordinated social engineering attack ... successfully targeted some of our employees with access to internal systems and tools.”
The appointment comes three months after Elliott Management hedge fund pressed for the ouster of Twitter CEO Jack Dorsey.
The agreement averts a battle over Twitter CEO Jack Dorsey's leadership but "lays the groundwork for eventually replacing" him.
Twitter shares jumped on reports that Elliott Management is seeking to replace Jack Dorsey because he also runs Square.
Slower sales growth also weighed on the stock but "new products and services can provide a second wind to growth as the year progresses."
“I believe Square is building the most innovative commerce ecosystem for sellers and consumers," Ahuja says.
Sarah Friar's six years at Square included an IPO — an experience she may repeat as CEO of social network Nextdoor.
Kayvon Beykpour will oversee product as Twitter switches to "a pure end-to-end functional organization."
The fourth quarter "was a breath of fresh air for investors that have patiently awaited for this turnaround story to manifest after years of pain."
