[fasouto]

It should be like this but I doubt that that's exactly how it works in real life.

Say that a recruiter gets a 10% of your salary, and you get an offer for $90.000, so they get $9.000 for their work.

Your value could be higher, let's say $120.000, so the recruiter can make $3.000 more. But the situation from the recruiter POV is: a) Make $9.000 now and work on another hire b) Waste time negotiating and possibly lose the $9.000 just to make $3.000 more

I will go with a), make $9.000 and move on.