Now I'm not saying that Vine is the next YouTube or even that it is monetizable, just that "we haven't figured it out yet" is not a convincing argument, and surely its userbase would be appealing to some buyer.
"We're losing money on it and have to fire people from the main company we should probably not keep this thing alive and we dont want competitors to our main product now it does videos neither" is definitely a convincing argument
I think Twitter is just failing hard right now and the shit has hit in the fan with investors. They are now on the "let's focus on our core product" phase of failing and hey, maybe it'll work, but that doesn't mean Vine is worthless.
1 second (and below) it might be possible to argue it's too short to register the advert consciously, making it a subliminal advert. Again I don't know if this is true and I'm completely making this up. It'd be interesting to find out the answer.
But I've also seen weirdly long ads - 10 minute ad on a 7 minute video, 30 minute ad on an hour long video.
I'm also noticing some ads have a loud noise at the beginning of a 30 second skippable ad.
https://www.youtube.com/watch?v=Dxg7fse74MY
https://www.youtube.com/watch?v=1crwU9aUNHE
It's really annoying.
This is the kind of thing that drives people to ad-blocking.