Actually the prices are really not that good. I looked for a trip to LA earlier this year and was able to do AMS-ZRH-LAX-ZRH-AMS for €1900 on LX in Business all in...... Just a cheapo ticket to AMS on top and I had a better deal than any of these 'special offers' that usually do not even include Taxes, etc.
I would stay away from these..... on top of not collecting (or sometimes 50% in UA MileagePlus) versus me collecting full 225%
