Thanks for your answer WEARY, in the DTI web site there are quite usefull tips as for example the "EMPLOYMENT AGENCIES ACT 1973" and from that you can tell that clauses like for example:
"The agency will pay you when paid by user Airline "are completely illegal, but it is true on the other end that the penalty beeing 5000 quid max they can easily stay out of the law.
Anybody has ever applied a complaint to the
EMPLOYMENT AGENCY STANDARDS
DTI
I would love to hear from their experience, and still waiting for info on IRISH Law