Women and younger shoppers were shown to typically buy products from merchants who stocked ethical products, with men and people aged 25 to 34 less likely.
Red Cross chief executive John Ware said New Zealanders had donated a record $115 million to the earthquake appeal that had helped 80,000 individuals and households in Christchurch.
Eco Store manager Malcolm Rands said his company had seen a seven per cent increase in turnover in the last financial year in a product area that had seen a 10 per cent drop overall.
"We are in a category of household products that is shrinking across the board and we've had a major competitor enter the market so we're doing well," he said.
"It's amazing when people get excited about buying dish liquid, it's usually a grudge product," he said.
Eco Store had been set up as a profit-making business alongside a charitable foundation called Fairground Foundation which put funds into organic gardening projects in schools, developed a housing project and had one full time employee.
Survey data was collected between December 5, 2011 and January 6, 2012 through online interviews with 500 people in New Zealand aged 18 to 64 who used the internet at least once a week.