Because they are a little less clueless than most HR departments.
Are there any recruiters working in technology who get it?
Yes. The top 1 or 2%. The bell curve of competency for recruiters is a lot steeper at the high end, so finding one who "gets it" is difficult. So when you do, keep them. Whether you're hiring or looking, they can change your life.
The problem with this kind of hackery is that it has breed an outright animosity to recruiters in large parts of the tech world.
When you stop to think about it, this may not be such as bad thing for the top 1 or 2% of recruiters. Once the wheat is separated from the chaff, it becomes more straight forward for a competent recruiter to do their thing and gain your trust.
In this way, recruiters have a lot in common with real estate agents, car salesmen, lawyers, and even programmers. The masses of mediocre ones give the whole profession a bad name, but the best rise to the top and really do make a difference.