google have been devaluing web 2.0 and profile links for several years now.
You could probably still get some results with web 2.0s, but you'll have to grow and nurture them like they're your money sites, but if you're going to do that you might as well build your own PBN cause at least you have control over it
Like
@MKSKS said, web 2.0s and profile links (and all other useless types of links for that matter, such as article directories, wikis, bookmarks, blog comments, forum profiles, etc) are only good for diversifying your backlinks profile and nothing else.
If its true we just can buy guest post . I think guest post still not working some times. I bought 8 guest post but not working .
guest posts still work (and work awesomely) IF you get quality ones. If you get guest posts on link farms you'll probably not see good results with them, but if you focus on quality (which is expensive, it's true) you're going to see good results in rankings, but you need to give those guest posts time to grow and acquire authority. In the beginning they're not worth much (which is why a lot of people just go for niche edits from the beginning).
Anyway, welcome to the "hating on google" train
