Fun fact: Where I live, to sign up for Apple's iOS developer program, I had to fax my personal/creditcard details to Apple. That requirement was so bizarre it took me a while to wrap my head around it.

(To their credit, I got a confirmation email from them in about a single day)

The article didn't mention it, but you can also sign and send the document via email (with the document as a PDF attachment). Or just download it as a PDF. We eliminate the print/sign/scan steps.

Is there a "generic" e-mail address (like "plans@tripit.com") or is it a unique / obfuscated e-mail address per user (like "2V6CFI@hellofax.com")?

The last time I bought a house we had to fax the contracts back & forth (with the estate agent as middleman, of course) until we agreed. It's not like any of us want to use faxes, but sometimes you have to. And if we hadn't had a fax machine at work, I'd have paid a few dollars for a temporary fax number.

Looks like a promising start. Hope things go well.

My company spent maybe $1500 last year in fax marketing.

Isn't fax spam illegal in the USA? Or are you elsewhere?

Legal loopholes.

Did it work?

It depends on what you are selling. But I have seen a response rate higher than any other form.