Web 2.0 and PBN works for getting good backlinks.
Comments sometime helps but only when you hit the right spot for example you are commenting on a blog topic "Best Food Recipies" and you are also having a similar blog so you can comment under it and ask them to look for your recipies too and if possible they can add your recipies in their blog post.
Profile Building works in Online Reputation Management, so you can say that these ways are not dead but their using behavior has now been changed completely.
Quality ones will work for sure,
better to add guest posts & crowd links for a better diversity
dont forget about pdf doc sharing sites as tier 1
forgot to add on the listno guest posts?
but yea they all work, as long as they're quality ones...
links in top relevant forums, Q&A websites, etc...What are crowd links?
What do you recommend for diversity?I'm not sure if the profile link and comment link still have power as tier 1 nowadays.