I could be wrong, but they were named "America's Team" because , at the time, they sold the most clothing with their logo attached...which is not so now...therefore, they are not "America's Team"...no?
No, they were "America's Team" because for years, whatever NFL logo stuff was sold, Dallas outsold almost everyone else combined. It hasn't been that way since the late 1980s, though, and certainly since it hasn't been "hip" to like the (supposedly) squeaky-clean Cowboys. Instead, it's the Raiders and Steelers.