The pocket/new tab method is good, except when you have too much stuff. There is a breaking point for both of those systems, in that you have too many "saved" pieces. When you get to that point, adding new pieces is meaningless.

The defined future reminder prevents this accumulation of delayed content to happen.

So your alternative is leaving your email everywhere and every time ? Hmmm. Not my idea. Sorry. I prefer one external (general) service / solution. Like emailing to myself, saving in a new tab or saving to pocket (if I think its really worth to make time to read).

But still, that is just me. Curious how the general public will react. For example, I am not much of sharing stuff that I read with everybody. If (sometimes) I share its with argumentation to specific friends. Not very common nowadays it seems ;-)

This is definitely meant to serve users who have a loyal association to a brand/blog.

I imagine it as a middle ground between email newsletter.