As an example, AC utilizes Hilton in a large number of cities. I have never once received as much as a free lunch from Hilton. They never offer me free cocktails, free food or anything approaching what an airline offers its frequent customers.
I've only been travelling about 4½ years. But over the last couple of years, I've regularly received the offer of cocktails (but I don't drink), snacks, meals, airline points and tickets, cash, lots of free rooms, regular upgrades (recently to full suites, even at a weekend rate of $61, in Chicago), merchandise, refunds, waivers, trinkets like mugs and key chains, and on and on. A colleague recently received an award of a 54" projection TV from Marriott. In the near future, I expect to receive either a camcorder or a an HDTV from Hilton, unless I choose something else from their substantial catalogue. (One of those portable DVD players looks pretty cool too, but my next laptop might already have one.)
Perhaps you haven't received any of these things because, as an airline employee, you pay a fraction of what most of us do.
Or maybe they just don't like you.