Patrick Byrne threw his company's shares into chaos last week after saying he had a relationship with an accused Russian spy.
Butina, who is serving 18 months in jail, is asking for the public's help to pay her legal fees.
The Russian agent pleaded guilty in 2018 to acting as a spy for the Kremlin.
Butina said if she was really an agent, "I would be the most unseen person on Earth."
Erickson, a conservative political operative, has been accused of fraud and money laundering.
Paul Whelan has reportedly been charged with espionage. Here’s what we know about him and his case so far.
Paul Whelan is accused of conducting a "spy mission" while in Moscow — a claim that his family disputes.
The Russian gun rights activist was enmeshed in Republican politics during the 2016 election.
The gun-rights activist has been accused of working for the Kremlin, including an attempt to arrange a meeting between Trump and Vladimir Putin.
Video of her singing "Beauty and the Beast" with the GOP operative is proof of their romance, her lawyer claims.
The Russian was living with Republican operative Paul Erickson when she was arrested.
The "Full Frontal" host takes on the NRA's Dana Loesch.
The meetings involved officials at the U.S. Federal Reserve and Treasury Department.
That way, the president will like you, quipped "The Daily Show" star.
Butina is accused of conspiring to influence American politics while covertly working for the Kremlin.
The NRA-linked gun rights activist appeared in federal court Wednesday, hours after the release of explosive new allegations against her.
"We get along with Putin," Trump told Maria Butina during his campaign.
Butina is heavily involved in the gun rights movement and is a "life member" of the NRA.