I am very new to shuffletracking, only been attempting such for several months and my efforts are very, very elementary. Basically as Bojack suggested I will attempt to track a very high slug of cards through the shuffle. Becasue I am not skilled enough to track many different slugs at the same time, I basically do not know the value of the cards they are being mixed with, so I don't attempt to figure out exactly what my advantage may be. If my very high slug was mixed with a low slug, the advantage could be much less than what I am hoping for. If it is mixed with a very low slug, which seems less likely, I may not have an advantage at all. It is even possible, but even less likely that my very high slug was offset by an even bigger low slug, creating a disadvantage.
So as I said, I don't try to figure my advantage, but instead figure that when this high slug arrives, I will have at least some slight advantage more times than not, so I raise my wager marginally. Not anywhere near my max bet of 16 units, but usually just bump up a couple units from what I would normally be betting at that count. If the count is neutral and I would bet 1 unit, perhaps I wager 3. I like to think as blackchipjim, that it is just another tool to compliment my counting and bump up my advantage slightly rather than a whole new method of AP. (at least in my case)
So, I may be one of the players Bojack is referring to that may be doing myself more harm than good. Time will tell. In the meantime I figure I have the added benefit of a wee bit of cover by bumping up some when the count doesn't call for it.