The word here from commentators I trust (I know, I know, everything I read is delusional propaganda) is that it's connected with the seizing of assets rather than mobilisation or new weapons (though that former is a factor). It's no longer a threat, the West is actively working on doing it from next month. What Putin and everyone among the Western hierarchs have in common is that seizing Russian assets is something neither side wants to happen, the West for obvious and exhaustively documented reasons and Putin for, oh let's call it, 'domestic considerations' (Mordashov's yacht is one thing, etc). Seizing the capital - not skimming the profit - would be the last of last resorts and would have irrevocable consequences for any future negotiations. It wouldn't surprise me if that article were mostly accurate in its details, insofar as Putin saying "We really don't want to go down that road, what about you?"