Greenzap offers what they refer to as "webcash". The theory is that you sign up for $25 in "webcash" and this webcash can be spent online.  After further review though, I found that the company had some questionable issues about their location and public access. As a business, your name, address, phone number, etc. is public information and reportedly, they did not "operate" from the location that is publicly recorded.
 
Also, the "webcash" is apparently hard to cash. I found all kinds of dirt on these guys online so beware. Even if you had thousands of dollars in webcash but you can't cash it, who wins? Some of the affiliated companies listed on their website argue being endorsers of webcash and dispute cashing the webcash.

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