zackdesign

This plugin is deprecated and should not be used for new installations.
PayPal API Subscriptions was built in 2008 using the PayPal NVP (Name-Value Pair) API v52.0, which PayPal has since discontinued in favour of their REST APIs. The plugin also directly handles raw credit card numbers on your server, which creates PCI compliance obligations that most WordPress sites cannot meet.
Recommended alternatives:
<ul>
<li><a href="https://woocommerce.com/products/woocommerce-paypal-payments/" rel="nofollow ugc">WooCommerce + PayPal Payments</a> — modern PayPal integration with Smart Buttons (card data never touches your server)</li>
<li><a href="https://www.memberpress.com/" rel="nofollow ugc">MemberPress</a> — full membership/subscription management with PayPal and Stripe</li>
<li><a href="https://www.paidmembershipspro.com/" rel="nofollow ugc">Paid Memberships Pro</a> — free membership plugin with PayPal support</li>
</ul>
What happens in v1.2.0:
<ul>
<li>Existing <code>[ppsa]</code> shortcodes display a retirement message instead of subscription buttons</li>
<li>An admin notice reminds you to migrate</li>
<li>All PayPal API code, the credit card form, and bundled jQuery have been removed</li>
</ul>

PayPal API Subscriptions

DEPRECATED — This plugin uses the discontinued PayPal NVP API and handles raw credit card data. Please switch to a modern alternative.

Șerban

On every single post, older than 1 year (365 days), you may add a custom formatted text, in order to let your readers 
know the information included might be outdated.

Old Post Warning

This plugin will display a custom notification on every single post older than 1 year (365 days).

PayPal API Subscriptions vs Old Post Warning