Get your links indexed, period!
There has been a huge debate wether you need to get your links indexed to get the link juice or wether crawling alone is enough. I always was a proponent of the former, but it seems there is now a conclusive answer to this debate.
This is what Gary Illyes from Google said today on Twitter:
Tldr; Get your links indexed!
Comments
We have to take into account that if your process uses links en mass, then there will always be that viral element to consider, and the fact that just sending spiders at your site through relevant links will help you to rank, even if the pages themselves don't actually get indexed.
I see evidence of this everyday with my spam projects. My indexing rates have never been worse, but my ability to rank, and speed in which I can rank remains completely unchanged.
Perhaps that's one of 'the few exceptions' he mentions?