Vine, as the theory goes, could also be massive, if X were to bring it back. But it is worth noting that Vine was never as popular as you probably think, and that Vine also collapsed because Twitter couldn't work out how to make money from it, and ensure that top Vine creators got paid.
I'm not sure that Elon and Co. would be able to monetize it well either, while it would also lack TikTok's secret sauce, being its super-attuned algorithm. Essentially, Vine 2.0 wouldn't be as great as many hope, would likely not end up being overly popular, and is probably not a great idea.
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