scottmotion

Enable a cron event that will remove active and/or pending user signups from the database.
Features: 
* Displays information about the signups table such as size and number of signups. 
* Enable or disable removal of active and pending user signups independently. 
* Set separate thresholds for how old the signups should be before removal. 
* Choose to email a report to the Site Admin each time the event runs. 
* Set how often the cron event will run and see when the next event is scheduled for.
Compatibility:
This plugin is designed to work with single-site installations running BuddyPress (2.0 or later) or BuddyBoss.

Signups Cron

Manage WordPress user signups via WP-Cron.

Andrew Norcross

Liquid Web

Allow customers to opt-in to news and information about the individual 
products they purchase. Each signup is listed in the admin dashboard, 
and actions and filters exist to hook into various email marketing provider.
Features
<ul>
<li>CSS based countdown display</li>
<li>available actions and filters to modify functionality.</li>
</ul>

WooCommerce Interest In Products

Allow customers to opt-in to notices about individual products.

Signups Cron vs WooCommerce Interest In Products