Elon Musk has asked employees to decide by Thursday evening if they want to remain a part of the business, according to an email sent by the company’s new owner to its remaining staff.

The social-media company laid off close to 3,700 people on Friday, only to reach out soon thereafter to dozens of employees who it decided were either fired in error or too essential.

The debate is especially fraught for people of color who have used Twitter to network and elevate their voices, while also confronting toxicity on the platform.

After floating the idea of charging users $20 a month for the “blue check” and some extra features, he appeared to quickly scale it back in a Twitter exchange with author Stephen King.

Elon Musk says Twitter will not allow anyone who has been kicked off the site to return until it sets up procedures on how to do that — a process that will take at least a few weeks.

The message to advertisers posted Thursday on Twitter came a day before Musk’s deadline for closing his $44 billion deal to buy the social-media company and take it private.