This card is basically just to tax the runner a bit more, preferably with an expensive piece of ice. If a breaker like Gordian Blade is breaking a DNA Tracker, then it would cost the runner 7 credits. Subtracting the card's rez cost equals a credit advantage of 5 credits in that scenario, better than a Hedge Fund, which gives a 4 credit advantage.
One synergy to mention is Komainu, which does not lose its subs until the run ends.