[brak1]

ISnt it more likely that it is just bots, that know your domain cos they have lists of every domain for that tld?

[wfunction]

Same question I had. Though it wouldn't be hard to control for, just put a random honeypot domain and see how many visits it gets.

[oxplot]

I didn't read the paper, but you'd know it'd bit squatting if the domain a-azon.com is hit with a HTTP Host header of amazon.com.