Elevating subwoofer about two feet off the floor

Any omnidirectional, long wavelength, (deep bass) is going to bounce around the room creating complex patterns of interference. As you move the source of that wave (your speaker, or in this case, subwoofer), away from a nearby, reflective surface (the floor) you change the frequency and amplitude (severity) of the quarter wave interference.  So, I guess the answer depends on the relationship between your sub and the floor and other walls in your room.  As a practical matter, it's hard to believe that this makes sense unless you have multiple subs and are trying to randomize the sub to wall/ceiling/floor distances.  In that case moving one sub off the floor could make sense.

The farther the subwoofer is off the floor the less the magnitude of vibration force the subwoofer transmits to the floor and thus to electonics, turntables, CD players, etc.

Actually, the question is whether raising the subwoofer off the floor about 2' will make it sound better. No need to purchase the bass trap that ASC is selling.

Another case of selling people something they likely don't need…bass naturally bounces around the room, and that's a reality that I personally don't mind as it sounds natural to me. If it doesn't, I turn my subs up or down a little.