Yeah, I discovered it several weeks ago. I think that it might be relying on some logic that might seem tenuous to us non-spammers: when people Google for travel terms, they use a lot of proper names. Those proper names don't get translated (and so appear with exactly the same incidence on tripfly as on FT), only the common words surrounding them. However, by the time someone's clicked through to tripfly, all that the evil spammers need is for 0.005% of them to click on an ad to cover their costs -- anything more is gravy.

It's also a way around Google algorithms that denigrate mirrored content, pushing it down the list of search results; Google can't tell that the texts are inherently similar, since such a large percentage of the words have been changed.

I might just toss a few random misspellings into my posts just to foil their babelfish...