Originally Posted by
vbroucek
cepheid - thanks for a very comprehensive response. I can see your points. I am not sure about any other country, but we do not have anything like your price-protection here in Australia and to be honest I doubt about any other country. That may also explain that it seems that UA is the only airline I can find so far that does this.
Also keep in mind that the refare is not automatic. The passenger must ask for it. Many passengers presumably do not do this.