The campaign asks people to change their profile picture on the social networking website to their favourite cartoon character as a way of showing their support for an end to violence against children.
The children's charity said last week that it had nothing to do with the campaign, but it had resulted in the number of people supporting it on Facebook jumping from 65,000 to 115,000.
A spokesman said that the NSPCC had been able to track where donations had come from and that £100,000 had been given to the organisation because of the campaign.
At one stage, the idea had been suspected of being a front for paedophiles who wanted people to change their profiles so they could befriend children. But the charity said it had seen no evidence to support this.
Paul Amadi, director of fundraising at the NSPCC, said: "The speed, scale and impact of the campaign has been quite astonishing – an avalanche of support and donations from people across the world.
"Social networking campaigns can have amazing reach and while the NSPCC was not behind this particular activity, we have been able to attract many new supporters, which will help us in our work."