Yes but the lack of micro holes and fissures precludes one of the most important functions of ceramic or similar media, the proliferation of anaerobic bacteria deep within the media for the de-nitrification portion of the biological chain.
That is the entire premise behind "live rock" in saltwater, the porous nature provides environments for all types of beneficial bacteria to thrive.
The scrubbers entire surface area is in constant contact with oxygen rich water, therefore it is impossible to develop colonies of anaerobic bacteria in them and as such they are actually less efficient/useful than media such as ceramic noodles, lava rock or SeaChems Matrix or De-Nitrate (my new favorites).
The pot scrubbers are a good solution for aerobic bacteria colonies, but they are not a complete solution and there are better choices available, IMHO.