Out of Stock Notification for Magento 1

SKU
outofstock
In stock
$69
$69

Requested Features
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In Review
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Coming Soon
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Completed
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When will magento 2.1 support for this plugin be available?
Logged-in user doesn't have to enter email
If the user is logged-in to their account then why do they need to enter their email address to be notified for the product? To make it easier, simply show 'Notify Me' button without having to enter the email address.
Ability to not display the "alert stock block" by product : eg for discontinued products