The thing about SEO in 2018 is that Google changes its algorithms more than once a day! Reports say that the company changes its algorithms up to 600 times a year. While the majority of those updates consist of smaller changes, among them is the occasional, major update like Hummingbird or Panda that can really wreak havoc with your traffic and search rankings.
To find the right people I downloaded a list of some of the most popular users within the community. To do this, I used Screaming Frog SEO Spider to gather a list of all the URLs on the website. I then exported this list into an Excel spreadsheet and filtered the URLs to only show those that were user profile pages. I could do this because all of the profile pages had /user/ within the URL.
Although it may have changed slightly since BrightEdge published its report last year, the data still seem to hold true. Organic is simply better for delivering relevant traffic. The only channel that performs better in some capacities is paid search ads, but that is only for conversions, not overall traffic delivery (Paid Search only accounted for 10 percent of overall total traffic).