Originally Posted by
fly2w
When I have seen this website advertised, I was wondering if in fact these websites have a special arrangement with the airlines.
As far as I know, Points.com is the only site that has such partnerships with various FFPs. However, don't expect anything close to 1:1 "swap." Just do a search on Points and their GPX, you'll find quite a few discussion threads about the ripoff exchanges/redemptions.