Simon

This plugin creates a full screen ad with an expiration date without cloaking. All you have to do is add a link, image and expiration and you can have a full screen ad with a cookie.
There are plugins out there that create separate full page ads or landing pages versus what Google sees. So the plugin would show the user one page while showing another page to a search engine. This can be called cloaking which is never really a good strategy to show ads or landing pages.
This plugin doesn’t create landing pages. This plugin creates full page ads to promote your product or service without cloaking.

Mega Ad

This plugin creates a full screen ad with an expiration date without cloaking.

Kevin Stover

James Laws

Important! This plugin is not a slider in and of itself. It is only an addon to the Solilquy slider which is available in the WordPress Repo as a lite version or you can get the <a href="http://solilquywp.com" title="Soliloquy - WordPress Slider" rel="nofollow ugc">affordable PRO version here</a>.
Scheduled Slides will add a begin and expiration date to each slide you add within Solilquy. This gives you the ability to add slides that you don’t want to display just yet. It also lets you set an expiration date for those time sensitive slides. Set it and forget it!

Scheduled Slides for Soliloquy

Scheduled Slides let's you set a date range for individual Soliloquy slides so they don't appear before or after.

Mega Ad vs Scheduled Slides for Soliloquy