I met one of our equipment suppliers some time ago at a conference. I was asking them questions about their line and they, with great interest, started asking me lots of questions. It turned out they were developing a new product and wanted lots of feedback. After a few minutes of this they asked if they could send me a trial unit to test out.
A month later we got a trial unit in. I left it in the office and had a couple other engineers try it out. After we all had a go, I had a 30m conversation with them on the phone giving them rather detailed feedback. They asked if I would like a thank-you gift. I thought it would be something small, like a flashlight.
It turned out that they sent me a $700 camera from their product line. I would LOVE to take this thing home, but since pretty much all the time I spent giving them feedback was really company time (honestly the phone call went way longer than I thought it would, otherwise I might not have done it), and the camera is something we might use once in a while (though not need), I'm a bit conflicted.
The one example I can think of similar to this is frequent flyer miles. If the company pays for a ticket, I've never heard of anyone not getting the miles for the trip. Is this similar?