ProBlogger enjoyed significant traffic from bookmarking site StumbleUpon, until the site declared ProBlogger unwelcome at its domain; thanks to social media, that changed fast.
Digg Burying Stories from Unbanned Domains
As you may know, digg recently unbanned a lot of domains, and www.mapelli.info was amongst them.
They claimed they have improved their algorithm to easily detect spammy content, and that there’s no need to ban domains now.