Agencies are all trying to build an up to date database of pilots. By applying to a position advertised through an agency the candidate adheres to a clause of not applying for the same position through a different agency. Just a plain simple competition between the usual suspects like Rishworth, CAE, Sigma, etc. Whether a real job is behind the advertised positions is yet to be seen, however most of them are only advertising as per their contract with the respective operators even though those operators stopped hiring, training, etc. until further notice. Also another thing is worth to mention: most Asian countries are banning entry of all foreigners making recruitment process extremely difficult, if not impossible. A Skype interview can only cover a part of the whole process, if any.