Restriction 4 in the plugin directory states:
The plugin must not embed external links on the public site (like a "powered by" link) without explicitly asking the user's permission.
This plugin adds "Search engine optimization by SEO Design Solutions" to a sites footer by default, upon activation.
In the plugins settings area, there are two options:
Enable attribution link
Enable attribution link CSS styling
With both options unchecked (default settings), the link is embedded.