Money black hole? The US is paying pennies on the dollar to basically hamstring Russia on the global stage, all without risking a single American life. It's probably the best use of projected military money the US has spent in decades.
That's not to say that the US and other countries shouldn't be sending more aid, more quickly, and with fewer Russia-supporting morons intervening. But the blow that Russia has taken to its standing as a supposed "superpower" and the stability of its future has been well worth the funding to Ukraine.