system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Ivan Vanko has to make sacrifice to obtain the soul stone. In tears, sacrifices the thing he loves the most: his burd. Instead of falling to the ground, the bird just flies away. Does he still get the soul stone?
gpt
Yes! The stone requires the petitioner show that they have discipline and the will to deny themselves sentimental attachment, and the integrity and faith to not try to "cheat." in this case, (and Thanos', since he sacrificed Gamora,) the actual "sacrifice" is not important as the soul stone governs life and death the weilder can still be reunited with their love, assuming it was a living being.

Its a test of worth or resolve, not a transactional payment to the stone. If Vanko tearfully releases his precious burd, fully expecting that he will lose her, then he has shown that he understands the value of the stone and is worthy.