The Magnitzky Act sanctions target specific Russian elites, as opposed the the general economy or market segments. And, per testimony before the Senate and reporting, those elites, or oligarchs, hold not only their own wealth but also Putin's; allegedly, the deal they made with him in return for their continued existence and prosperity was/is that he gets 50% of what they make.
So, yes, they are very interested in getting around the sanctions.
P.S. One source of the above; testimony before the Senate. This occurred right around the time Trump issued his tweets against trans-gendered individuals' participation in the armed services, leading some to ponder whether the latter was a distraction tactic.
