For years I've used a tactic of suspending members of an engagement program so they can't receive emails other than the ones in the engagement program stream I put them into. When it's time to send the next engagement stream email, let's say 10 am on Tuesday, I run a smart campaign at 9:30 am to unsuspend these individuals send the email at 10 and then suspend them again at 10:30 am - see attached. In other words I'm creating a 1 hour window in which they can get non-operational emails. Marketo's made a lot of advancements in the past few years since I adopted this approach. Is there any more elegant way to accomplish this objective?