With Twitter’s planned billion dollar stock market float coming up, speculation abounds as to what changes may be made in a push for profitability.

A financial analyst from the US says that the service’s 140-character limit will be killed so that advertisements can have all the space they want.

Twitter announced its official IPO plans over the weekend, saying it had 218 million active users as of June 30, lost nearly $US80 million on nearly $US317 million in revenue in 2012 and would like to raise $1 billion from the float.

The company will trade under the TWTR ticker, but has not indicated on which stock exchange it will actually be sold.

Announcements led to confusion over the weekend, and a reported 1500% jump in the value of stock in an unrelated company with the ticker TWTRQ.

Twitter claims to generate 65 per cent of its money from advertising on mobile platforms to around 100 million daily active users. However, chief executive of financial information provider PrivCo Sam Hamade says it will need to be willing to change from its tried-and-true format to appease the shareholders.

“Once it's a public company, it has very demanding stockholders to meet and missing earnings or growth slowing - Wall Street has no mercy,” Mr Hamadeh said.

“You can bet they will punish Twitter for any misses and I think it's inevitable they will loosen that 140-character limit. It's not a sacred cow... they're very short messages, very concise but for an advertising vehicle it doesn't allow advertisers much room to really sell their wares.”

Technology industry authority Ross Dawson says Twitter only needs to learn from the mistakes of Facebook’s market debut. Facebook has not been the success it was expected, facing numerous glitches, lacklustre prices and criticism of its reliance on advertisement.

Twitter could be a big figure across media, Dawson says.

“For example, television networks where Twitter can facilitate both the information and the engagement with other forms of media and other forms of advertising... so once they extend beyond being able to extend the right messages to the right people as Facebook are doing, they could continue to generate revenue - although that will be a challenge,” he said.

According to many insiders, Twitter will almost certainly roll out significant changes immediately after falling into the shareholders’ domain.