The company said in an email that the co-founder and former CEO would no longer serve on the board. Though the exit was expected since last November, it still marks the end of an era for the company at a time when it is grappling with whether or not The Rocket Guy will actually follow through on his bid to take over the company.

The co-founder's final days as a board member were not pretty. In an interview this week, Goldman slammed the board after it was reported that he had told Musk that he believed the company would perform better. Goldman said this suggests that Musk was encouraged to acquire the company.

Goldman said that it was a clear backstabbing of the board by the founder when they had a deal in hand to come to a standstill.

In November of last year, he resigned from his position as CEO. The man of many faces said in his exit letter that the company had become too founder-led and limited. Jack was a part-time CEO, splitting his time between Block and his other company.

That's at least what he takes. One year after surviving a coup attempt by a hedge fund, Dorsey was pushed out. Long-time followers of the company will remember that this wasn't the first time that Dorsey walked away. In 2008, a year after becoming CEO, he was first removed from the position and then regained it three years later.

He publicly voiced his support for Musk's attempt to take over the company.

Another return seems less likely now that he has lost his seat. But not impossible.