What, you would be fine if they just took the donated money and didn’t transmit it to the campaign operators? If their devops just ignored the campaign if there was any issue? And somehow they don’t need to handle support inquiries from happy (or unhappy) customers?

If you really think a business like kickstarter is all fixed costs and there is zero work for a marginal campaign, sounds like you’ve found a great business opportunity. VCs will beat your door down if you’ve found a model that scales with zero marginal cost and zero work for a new customer.