Twitter users voted on Monday for Elon Musk to quit as head of the social media giant in a poll the technology tycoon ran on his future and promised to abide by its results.

A total of 57.5 per cent voted "yes" after the 51-year-old billionaire asked his 122 million followers whether he should stand down. Over 17 million votes were cast in the poll that began on Sunday evening and ended early Monday morning with most respondents voting in the affirmative, CNN reported.

Musk did not immediately react to the outcome of the vote.

He tweeted on Sunday: "Should I step down as head of Twitter? I will abide by the results of this poll".

"As the saying goes, be careful what you wish, as you might get it," Musk added in a later tweet.

In the past, Musk has obeyed Twitter polls. He's fond of quoting the phrase "vox populi, vox dei", a Latin phrase that roughly means "the voice of the people is the voice of God".

Since buying Twitter for USD 44 billion and taking over as the CEO in late October, Musk, who also runs Tesla and SpaceX, has journeyed from one controversy to the next.

Musk also announced on Twitter that major policy changes would be voted on moving forward.

The poll comes as Twitter says it will shut down accounts solely designed to promote other social media platforms.

The measure would also affect accounts that link off to or contain usernames from platforms such as Facebook, Instagram, Mastodon, Truth Social, Tribel, Nostr and Post, the company said in a tweet, the BBC reported.

But cross-content posting from other sites will still be allowed.

Twitter had already blocked users from sharing some links to Mastodon, the platform many Twitter users moved to after Musk's takeover.

But in a series of tweets on Sunday Twitter said: "We recognize that many of our users are active on other social media platforms. However, we will no longer allow free promotion of certain social media platforms on Twitter.

"Specifically, we will remove accounts created solely for the purpose of promoting other social platforms and content that contains links or usernames for the following platforms: Facebook, Instagram, Mastodon, Truth Social, Tribel, Nostr and Post."

Examples of possible violations could include tweets such as "follow me @username on Instagram" or "check out my profile on Facebook - facebook.com/username", it said in a blog setting out the details.

Any attempts to bypass the restrictions would also be a breach.

Musk's announcement was the latest in a series of decisions by Twitter to generate blowback, after the suspension last week of more than half a dozen journalists who report on Musk.

Musk immediately fired several top executives, including its Indian-American CEO Parag Agrawal, and laid off about half of Twitter's staff after he took over as head of the social media platform in October.

He then gave an ultimatum to the remaining staff that they need to do "extremely hardcore" work or leave, resulting in another thousand or so employees quitting the company.

Musk has started, stopped and restarted a revised verification system that costs USD 8 for a blue check mark.

The billionaire's approach to content moderation has also been criticised, with some civil liberties groups accusing him of taking steps that will increase hate speech and misinformation.

On Friday, he reinstated a number of journalists he had suspended for allegedly sharing location data about him after the EU and UN called it an attack on press freedom.

Reporters for the New York Times, CNN and the Washington Post were among those locked out of their accounts.