What games?
I can almost imagine this could work in some DoN's. Average hand count of a DoN's might be around 200 hands, so for grins lets assume these are all from one single DoN.
200's is 30 min bets (via blinds) at a 10 seat table, or 33.x at a 9 seat table (DoN's are usually 10 seat, or 8). So, it might also be assumed that the only flops he saw were walks in the BB or monsters.
Let's assume that he got called (by only one player) in the 1 hand he won at showdown and it was a checkdown. That would mean at least 5 minbets (BB, SB, and one limp), for a net investment of 25 minbets in that DON.
Now lets assume he only plays AA, KK, QQ, but not aggressively (he did not raise, but called all bets), but the hand was very active. He could have profited many more minbets, and in the end doubled his buy-in for an overall +EV.
If we go another step, and assume he gets agro with those hands, he could profit much more on those very few hands he plays.
Add in the occasional walk in the bb, (not sure how either tracker deals with walks), and the actual cost over those 200 hands could be significantly lower, like 20 minbets perhaps. Maybe even lower.
Theoretical of course, but I usually play DoN's pretty nitty. Not that nitty, but pretty nitty. As do most players who need to double up.