An alleged criminal enterprise made millions from people who bought defective software on the promise it would make them up to $80,000 a year, a court has heard.
Aaron Colin East and Theresa Faye Merlehan are charged with fraud over the alleged cold-call scam run from the Gold Coast between January 2014 and August 2015.
Crown prosecutor Greg Cummings says buyers paid about $18,500 for sports betting and investment software tools.
They were told it would make them up to $80,000 profit a year if used for just 15 minutes about three times a week.
But instead the products "didn't work at any level", Mr Cummings told the Brisbane District Court.
At least 167 buyers were involved but also a large number of others on the enterprise's database who did not provide statements.
Mr Cummings said the fraud involved a "very sophisticated operation".
Sales staff used false names and at times pretended to be in offices in Adelaide and Canberra that did not exist.
The trial has heard evidence from Neil John McKenny, who is serving a sentence for fraud in relation to his involvement in the enterprise.
The Irish national told the court he was on a backpacking holiday in Australia in 2005 when he started doing IT work for those involved in the scheme.
He said the enterprise was rebranded with a new name and web presence at least 12 times while he was involved because customers had complained or criticised the scheme.
The group also set up fake companies with websites and contact details that appeared to be in competition with their own.
Potential buyers who emailed about the fake company's products or price would receive a response from the alleged scammers.
The court heard the syndicate made $3.5 million over 18 months.
East and Merlehan denied knowledge of the alleged criminal activities of the enterprise, their defence barristers told the court.
The trial continues.
Australian Associated Press