Koberstein

<p>This plugin adds an option under ‘General Settings’ for you to put your donation Bitcoin address.  It places this address in hidden meta tags in the head section of your site.  This allows your site’s Bitcoin address to be detected by browser extensions that allow visitors to make donations or microtips to your website.</p>


Bitcoin Meta Tags

Sébastien Dumont

Wysija

<blockquote>
<h4>Minimum Requirements</h4>
<p><a href="https://wordpress.org/plugins/wysija-newsletters/" rel="ugc">MailPoet 2</a><br />
  <a href="https://wordpress.org/plugins/woocommerce/" rel="ugc">WooCommerce v3.0.0 or higher</a><br />
  <a href="https://wordpress.org/download/" rel="ugc">WordPress v4.7 or higher</a></p>
</blockquote>
<p>This integration connects your WooCommerce store with MailPoet 2 so your customers can subscribe to your newsletters as they checkout with their purchase.</p>
<h4>Features</h4>
<ul>
<li>If you have more than one newsletter list, customers can select which list to subscribe to when making a purchase.</li>
<li>Double Opt-in.</li>
<li>Decide if the checkbox/s to subscribe is checked or un-checked.</li>
<li>Place the subscription fields on the checkout page where you want them to be.</li>
<li>Custom checkbox label.</li>
</ul>
<h4>Translation Support</h4>
<p>MailPoet Checkout Subscription for WooCommerce (Legacy) is in need of translations. Is the plugin not translated in your language or do you spot errors with the current translations? Helping out is easy! Click on “<a href="https://translate.wordpress.org/projects/wp-plugins/mailpoet-woocommerce-add-on" rel="nofollow ugc">Translate MailPoet Checkout Subscription for WooCommerce (Legacy)</a>” on the side of this page.</p>
<h4>Support</h4>
<p>This plugin will no longer be supported or maintained. I suggest you upgrade <a href="https://sebastiendumont.com/product-category/mailpoet/" rel="nofollow ugc">MailPoet Checkout Subscription for WooCommerce</a> to receive continued support. <a href="https://wordpress.org/plugins/mailpoet/" rel="ugc">MailPoet 3</a> will be required. All previous settings will be carried over.</p>
<blockquote>
<h4>Additional Features</h4>
<ul>
<li>Manage subscription from account dashboard.</li>
<li>Subscription notice added to order email if customers subscribed.</li>
</ul>
</blockquote>
<p><a href="http://eepurl.com/c0hQe9" rel="nofollow ugc">Sign up</a> to be notified of release.</p>
<p><strong>More information</strong></p>
<ul>
<li>Other <a href="https://profiles.wordpress.org/sebd86/" rel="nofollow ugc">WordPress plugins</a> by <a href="https://sebastiendumont.com" rel="nofollow ugc">Sébastien Dumont</a></li>
<li>Contact Sébastien on Twitter: <a href="http://twitter.com/sebd86" rel="nofollow ugc">@sebd86</a></li>
</ul>


MailPoet Checkout Subscription for WooCommerce (Legacy)

Very useful

Unfortunately it doesn't yet work with WooCommerce 3.1
Did some further checks and it works perfectly with WooCommerce 3.1 as well.
Great plugin, does what it promises! Thanks for this!

Works with WooCommerce 3.1 as well

Let your customers subscribe to your newsletters as they checkout with their purchase.

Bitcoin Meta Tags vs MailPoet Checkout Subscription for WooCommerce (Legacy)