I wonder what counts as a "travel" card?

With all of the fiddle-farting around that Barclays is doing with my Travelocity AMEX, I might be tempted to switch. And I easily cleared $50k in spend on that card last year (I have the grandfathered 4% version). But since it earned Travelocity credit, and not miles or points within a specific program, I wonder if they'll try and reject it?

(Common sense says, "no", but 100k points is a lot of points.)