It will sometimes help. NO commissions on air travel. But you can go on fabulous FAM trips (familiarization trips) for pretty cheap.
http://www.famnews.com/
http://www.famconnection.com/
We hold a card through these people.
http://www.globaltravel.com/home/def...N=&PROMO=&AFF=
We have NEVER booked a thing through the company-their prices are too high.
But I have booked my own cruises, saved maybe 8% (we actually took upgrades instead of cash off). The best benefit-lots of high end hotels have agent/FAM discounts. The only catch-you MUST tour the hotel and listen to the marketing info. We spent 4 days at the Sheraton Pulitzer, AMS last year. They gave us a large suite for $129.00 per night. Regular Starwood price was over $400.00 per night. And the tour was really interesting. Also got a pretty good break (although nothing like AMS) at the Furama Resort in Danang Vietnam last October.
Thoroughly investigate BEFORE you invest. It will probably cost you about $500 per year.