The plan was to raise $20m to keep the factory open on a portion of the site, with the public share offer preceded by a two-week pledge period to gauge interest and potential financial support for the plan.
Within the first 24 hours more than $1.5m had been pledged from more than 1000 individuals, with the amount hitting $3m last night, although Horne said this was not a concrete figure.
"There's obviously no checks on whether they have the money so it's not a firm commitment," Horne said.
"You can go out and get pledges without really providing much information so it can be an idea or a dream, but when you convert that to actually wanting to take physical money off the public then it becomes more difficult," he said.
"You have to provide a lot more information and background work around financials and projections and all of that kind of thing so people can make an educated decision."
According to O'Malley, the initial plan was to raise between $5m and $10m through the site ownthefactory.co.nz, which would provide a "stepping stone to getting the rest of the money", after which time a formal company filing would occur and a board would be formed.
Current pledges ranged in size from $50 to $50,000 and had come from New Zealand and as far away as Australia and the United States, O'Malley said.
Several "wealthy individuals", whom O'Malley would not name, had also indicated they were interested in discussing a future contribution, he said.
The pledges were non-binding, but those making them had been asked to do so only if they intended to invest in the future, he said, adding the results so far were "pretty exciting".
Mondelez, the owner of Cadbury and the factory said it had received several expressions of interest from parties wishing to take over production of the Kiwi treats and was working through these.