@francescbassas...

Ok, I hadn't paid enough attention to the whole thread and noted that Chassé is an extension that does what I want. I will give it a chance!

The advantage is that if at any point they unsubscribe from your damned incessant mailings 😆 then their mailings stop....

That's exactly what Chassé can do for you, except for (1) which you have to automate yourself by some logic somewhere....

I wouldn't handle it differently. Are you thinking of something like a CiviCase with scenario to make it easier to set up?

Has anyone made any progress on this issue? Soon I will find the need to be able to reproduce a flow like the following:...