Transactional Funding. What is it?

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I'm a newbie and have recently seen many ads for websites offering "transactional funding" on gmail. Can someone explain the process? All the ads give you is a vague, though very optimistic, blurb about how their company gives you all the money you need, no credit or income verification necessary, just easy money with nothing down, like all the hucksters promise.
What kind of transactions are they talking about? Is this a legitimate tool for investors? Something newbies could use? What are the real costs?