What's the major extranet you're using for hostel?

Currently, we are using hostelworld, hostelbooker, and booking.com, and our boss is adding expedia for the hostel as well. Are there any other extranets which is good for north america market?

and since our review is very good in booking.com compare to other hostel's in the same region, there're more percentage of people booked through booking.com rather than hostelworld. and hostelbooker only contribute a very small part of booking.

i'm also curious about what's the percentage of guests dose hostelworld, hostelbooker in your hostel compare to walk-in?