Matt Callen is a professional.
Being professional does not protect you from typos.

He sent out an email to his list the other day, inviting
us to go to a domain and look at a product he thinks is great.

If we agree, he usually earns money because we buy the product.
Pretty normal really. :)

So, he owns this domain http://www.visitorspy.com and tells us to go there.
The information is not on the domain though. The domain redirects visitors to
his Clickbanklink for this particular product, or atleast it was meant to do so.

That's where the typo comes in. He redirects to:
http://.visitorspy.hop.clickbank.net/?pid=91 and the extra "." ruins everything.

Most potential customers will not correct your URL when you have typos
and you lose potential earnings immediately.

I have tried to tell Matt directly, via his brother and through their supportsystem.
Will be interesting to see how long it takes him to correct it.

I got in touch with his support, but wasn't impressed much. :)
But they got back to me within a few hours, so that's not bad.

Personally I would have visited the domain and asked questions later.
Visiting a domain takes little to no time.

Instead they write this and send it to me:
"what redirect are you talking about, I see no issue with that domain."

The clock is ticking and sales are lost.

Always go through what you want your potential customers to go through,
as if you really are a customer and see everything for the very first time.
You will notice errors like the redirect above immediately.

Still has the typo and still losing money.

Still has the typo and still losing money.

No wonder that it seems that he doesn't care.
I just tried on another computer and it didn't redirect at all.
Strange.