This is a good idea. For our team members:
This would add the ability to subscribe to specific Sequences or Campaigns on the "Manage Your Subscriptions" page even if you are not already subscribed to it. Currently you only see the Sequences or Campaigns you are actually subscribed to that have been configured to be listed on the page. This allows the contact to opt out but not to opt in, and misses a re-engagement opportunity.
It would be nice to be able to designate one or more Campaigns that would appear on the page for everyone, even if they aren't subscribed to it. I see this as a separate option in the Subscription Settings dialog. Something like this:
This is done by some email providers. People intending to opt out will often choose a new campaign they were not aware of.
