I definitely think this is aimed more at carded collectors than loose collectors. They really haven't hit of those really HTF vintage figures yet.
You're definitely right in that assessment. These releases are aimed at carded collectors first and foremost. I have 5% or so of my collection on card, and that is mostly because of lack of inertia when I got the figure, so I tend to lose sight of the carded collector.
Not many nice Kenner era figures can be had for $15 these days.
I must be blessed, there is a vintage toy store near me that has an 4-foot tall R2-D2 cooler full of loose Star Wars figures for sale that I regularly dig through. Lots of modern, but lots of vintage too. Last year I wanted to get the Kenner bounty hunters again so I dug through and scored 4 of 6 all looking really good. I have always had really good luck there, and have rarely needed to look elsewhere when I get an itch for a specific loose Kenner figure.