Use original article to post on web 2.0 sites and linked it with your main website. Then do some link building for your article and social media promotion, this way you'll get traffic but SEO benefit as well.
yes web 2.0 sites are very effective for SEO seein SEO we havt to generate backlink means quality backlinks with quantity so everthing that gives you quality backlinks is necessory.
Definitely the web 2.0 website is very beneficial or effective for SEO because you can get lots of backlink and huge traffic from web 2.0 websites. But you have to use quality work in this kind of website, so you can get more benefits for your website.
Use unique content to publish on web 2.0 websites and attached it with your primary website. Then do some link-building for your content and public networking marketing, this way you'll get visitors but SEO advantage as well.
Sure My answer for your question is 100% yes. When you linking high page websites to your site the page ranking getting share with that site. It's a reasonable and worthy way of linking 2.0 listed pages and it can increase your page traffic on Search Engine.