What you see on that page is a Drupal form where the form fields have been heavily themed to appear differently from how you would normally see that type of form field on a Drupal site.
Looking at the HTML source of that page, it is clear those selectors are simply checkboxes rendered with a custom theme function.
<div class="form-item" id="edit-features-28711-wrapper">
<label class="option" for="edit-features-28711"><span class="feature-icon" style="background: url(/sites/default/files/connect.png) no-repeat center center;"> </span><input type="checkbox" name="features" id="edit-features-28711" value="1" class="gardens-feature-checkbox" /><span class="label-text">Follow us</span></label><div class="feature-preview"><img class="preview-image" src="/sites/default/files/stay-connected_0.png" />Gain a following. Provide links to your (or your users') profile on Twitter, Facebook or other social networks.</div>
When I turn off a feature, I see a CSS class being added to a tag, and another tag value being changed. The value associated with the checkbox is not changed; it is 1 when the feature is enabled, and it is still 1 when the feature is disabled.