Back in Stock: Quantity Required Field in Signup Form

Back in Stock has support for Shopify Locations:

If your store has multiple locations active, but you only want Back in Stock to read from specific locations, then Locations support can be activated.

To activate locations support:

• Go to the Restock Alerts page
• Click on the Manage settings -> Locations
• Back in Stock will then ask for additional permissions to read locations:

Once active you can tick off the locations you want Back in Stock to not take into account the inventory for:

Then you can 'Save locations settings', notifications will then only send out for the ticked on locations.