Provence said:
That's how I look at it, too.
No need for a Twitter version with the same resolution (or less) and no visual differences as an already existing Pixiv post, because Pixiv > Twitter. That said: Flagging the Twitter Sample in that case, but don't reupload the Twitter version. It would get flagged, because of inferiour quality than already existing post.
Yeah. On the other hand there is the situation where the full twitter version comes first, but a topic for that is already opened: topic #12743
That being said, I do sometimes see some builders with unlimited uploads upload the twitter version after without realizing there's already a better version, and then they just parent it as if the twitter version was uploaded before. I'm not one to complain, but if you look through something like source:http://twitter.com/ parent:any it's happened here and there.
EDIT: Also, since the unrestricted flagging for contributors isn't implemented yet, can we start that temporary "flagging samples" thread so Janitors+ can clean up stuff? I'll go through a bunch of twitter samples or md5 mismatches and try to get a bunch of stuff done for today.