It depends on your perspective of a b2b product. If by b2b you mean business to fortune 500 business, then there is probably not a way around it. If you're talking about business to mom and pop shop, Kickstarter is perfectly suitable - look at the top tier prizes. They're usually geared towards buying them in bulk, probably with the intent of reselling them.
The reason I would say that it is an impossibility to talk about selling business to fortune 500 type business is because invariably, they have venture arms which function like the finance industry and are usually staffed by former employees of Goldman, JP Morgan, etc. So, the insiders have found a way to do what they want - they're their own bank, unless we're talking about major mergers and acquisitions, which obviously require such fast sums of capital that it's unreasonable to expect such an accessible market.
The reason I would say that it is an impossibility to talk about selling business to fortune 500 type business is because invariably, they have venture arms which function like the finance industry and are usually staffed by former employees of Goldman, JP Morgan, etc. So, the insiders have found a way to do what they want - they're their own bank, unless we're talking about major mergers and acquisitions, which obviously require such fast sums of capital that it's unreasonable to expect such an accessible market.