[kaizendad]

As a marketer in a former life, I can't understand why somebody would do this. It's very cheap to get a separate phone number for each inbound channel and there's tons of software that will track which channels are working for you, starting at the low end with an intern and Excel.

[skrebbel]

It's just a bug. Somebody made a script that appends tracking codes to every <a href=".."> in the document.