sitepointdevs

As descibed in-depth on <a href="http://www.sitepoint.com/sitepoint-random-hello-bar-wordpress-plugin/" rel="nofollow ugc">SitePoint</a> a hello bar is a thin bar of content that slides into view once the user scrolls past a set point on a page. 
The message content is up to you, but is ideal for advertising, product annoncements or other messages.
This plugin provides an admin interface to create multiple hello bar messages that can then be randomly displayed on user facing pages.
By setting weightings for each message you can determine how often each is displayed. On each page load a message is randomly selected 
(respecting the weightings given). A random number is generated client side before fetching the message content to ensure it is compatible 
with caching services such as W3 Total Cache.
All the required javascript and css is included in the plugin and can be set to enqueue via settings. 
Alternatively you can roll your own. To help with that the core javascript has been extracted into the <a href="https://www.npmjs.com/package/sp-hello-bar" rel="nofollow ugc">sp-hello-bar</a> 
npm module for you to include in your own scripts.

SitePoint Random Hello Bar

Randomly (with weighting) shows a hello bar message on page scroll.

Content.ad

<a href="http://www.content.ad" rel="nofollow ugc">Content.ad</a> is a content recommendation platform that helps site owners generate more time-on-site and monetize their content easily and unobtrusively. Content.ad serves billions of impressions across thousands of sites every month. The WordPress plugin is the quickest and easiest way to get Content.ad up and running on your site.
<h4>Key Features</h4>
Simple Setup – Our 3-step guided installation gets you creating your first widget in minutes.
Flexible Styling – Our widget creation wizard makes customizing the look and feel of the widget simple and straightforward.
Performance Driven – Our state-of-the-art algorithms learn what content is most popular with your users, lowering bounce rates and increasing overall site revenue. Also, since optimization takes place on Content.ad servers and the widget is loaded asynchronously, the plugin doesn’t slow down your site.
Powerful Options – Free enterprise-level features let you control how the widget integrates into your site and what kind of content appears in it, all without leaving your WordPress admin.
Rich Reporting – Use our robust reporting and graphing options to see exactly how well your widgets perform down to the hour.
Personalized Support – Our US-based support staff is available to help you properly set up and optimize Content.ad to meet your needs.
To learn more about Content.ad, visit our <a href="http://help.content.ad/" rel="nofollow ugc">publisher FAQ</a> or <a href="https://www.content.ad" rel="nofollow ugc">visit our website</a>.

Display popular content to your users from your own site and/or from our sponsored partners, increasing visitor engagement and revenue.

SitePoint Random Hello Bar vs Content.ad