interesting condition of reservation.

I found out that there are sites which help you to advertise your property by '' request only booking ''.

So , the tourists who would like to book your hostel , first make a request , actually , it can be helpfull if you advertise your place at many web sites and in order to prevent the overbookings , it is very suitable way of booking.

Instead of signing out , or to delete hostels profile from some web site , it is good to work with those web sites by '' request only bookings.''

Does any one has any thoughts about '' request only bookings'' ?

Thank you.