Google’s John Mueller updated that Google don’t indexes or follow most of the WEB2.0 links created in different WEB2.0 platforms, they could be from Youtube, Pinterest, Articles or any other platforms.
He Quoted:
We’re already mostly ignoring those links (just like we’re ignoring the “web 2.0” / Pinterest / YouTube / article / etc links), but if you see them and want to make sure that they’re not causing any issues, disavowing them is fine.
This is true that most of the WEB2.0 links are nofollowed nowadays. And this is the main reason of ignoring such links.