I admit I haven't read through all of these posts, so I am not clear as to the controversy here, but, I don't get the concept of "20 time the voltage for free." The cartridge's output is fixed -- it is a certain amount of mv per the particular modulation supplied by the record groove. As a low impedance source, it is delivering this output as, relatively speaking, a high current, low voltage signal. What phono stages do is amplify/convert the signal to a high voltage/low current signal. An input SUT converts the high current/low voltage signal to a low current/high voltage signal -- nothing is "free." A loading resistor of any value across the primary acts as a voltage divider which will dissipate some of the signal as heat (i.e., a loss). Of course, the higher values used means that little is lost. The voltage gain (at the expense of current) is determined by the turn ratio of the SUT, I don't see how it has anything to do with loading.
My phono stage has a loading resistor across the primary. The recommendation by the distributor of the phonostage is to experiment with the value of this resistor to optimally load the chosen cartridge. The distributor does not recommend changing the value of the resistor on the secondary side. This makes sense to me. That resistor provides the optimal loading of the SUT itself (these things will have their own electrical resonance properties).
My phono stage has a loading resistor across the primary. The recommendation by the distributor of the phonostage is to experiment with the value of this resistor to optimally load the chosen cartridge. The distributor does not recommend changing the value of the resistor on the secondary side. This makes sense to me. That resistor provides the optimal loading of the SUT itself (these things will have their own electrical resonance properties).