GSA Search Engine Ranker by itself cannot post to many web 2.0 platforms. What I instead do is use GSA SER mainly as tier 2 and tier 3 links and use RankerX to create high authority backlinks like web 2.0s, profile backlinks and bookmark submissions among other types of links.
Web 2.0 platforms are a great way to get contextual backlinks to your site from domains with high Domain Authority. Creating a branded web 2.0 network is ideal to claim your domain name on major platforms and help your website rank in Google.
RankerX creates backlinks from several different platforms including Premium sites such as WordPress, Tumblr, and more.