I think this parenting is fine. Either way could work, but I uploaded this one too because it looked less artifacted, albeit that could just be the fact that it's intentionally downscaled by the artist. But it doesn't really look like a "sample sample", that is -- it's not a downscale of the Twitter fullsize.
EDIT: Ok, checked, ugh... Yomu reuploaded a Twitter large sample to his pixiv. Damn.