I tried this for booking my current business trip. I offered a $100 reward for a five city US excursion, originating in Japan, with the proviso "I use Delta. Make sure I get miles for this, either with them or an allied carrier."<p>The best offer I get that actually read that instruction knocked $3,000 off the $5,000 that Delta.com quoted me. <i>I went with Delta</i>. I have the utmost respect for the amount of searching which went into it, but the instructions I got back were 6 steps long, with each step sounding like "Book a one-way flight from X to Y using this web interface", and I was terrified of getting halfway through and then being stranded in Des Moines not able to book the rest of the flights at anything near the quote.<p>I'm <i>so there</i> if they can handle the bookings themselves, such that I'm not the one bearing the risk-of-failure-to-book.
I had $300 shaved off of a $1100 trip. Some of the posters really must read the criteria first and one, who I ended up going with, went way above and beyond in his helpfulness for the default bounty ($30?).<p>The only thing I'm worried about now is somehow getting my luggage wired through all legs of my trip rather than my having to go through immigration at each stop and pick it up, only to go back through again and drop it off :P