If I understand things correctly, the other plus of the enrollments, if that is all you get, is no shipping charge, unlike the “order 3 items during the year” and after that the shipping is free. Since you are limited to 3 of the Morgan dollars, that household limit seems to work, as there are still plenty available, but seem to be going fast.
For those of us who jumped on the 3 roll set of women’s quarters, that was limited to 1 per household under the enrollment method, so I do think the limit does help. Those lasted a few weeks.

At the moment it is still possible to subscribe to the Morgan / Peace dollars in proof or uncirculated. I can’t speak for other issues since I am not interested, though a quick look indicates the 2023 unc silver eagle is available. go to the mint website and under shop/coins you can subscribe. You do not have to order those items quickly at the moment they are released. There is no excuse if you really want up to 3 Morgan/Peace dollars. The mint actually changed the system for ordering those coins and in my opinion made it tons easier to obtain them without fighting the big guys.

And likewise, Mike, we all enjoy and appreciate hearing from you. So keep those comments rolling. – Rich

according to the “data-available” method there are less than 10,000 sets available now.
The question is, does that mean overall or just by subscription.
After the way the numbers changed dramatically on the ‘next year’ dollars, I am beginning to wonder if the number available for subscription is something like total available less 25%. That way, on the day of release the mint has something they can actually sell.