Currently, there is no option to manually add email subscriptions to Unroll.Me.
When you connect your mailbox to Unroll.Me, you can view all detected subscriptions under the "Inbox" tab on the Unroll.Me website or app. There, you can edit the subscriptions arriving in your inbox.
Unroll.Me’s algorithm is designed to scan your inbox for subscription-based emails only. If a subscription isn't in that section, our algorithm doesn't detect it.
We are constantly working on improving our algorithm to combat this, but it's an uphill climb.