Don't expect it to last long on HasbroPulse based on other recent exclusive sales though...
The last 3.75" 3-pack convention exclusive was Doctor Aphra and her Droids and that featured a new sculpt, a new Build-a-Droid Astromech, and a black C-3PO repaint - the latter two, according to Hasbro will never be re-released - and that set was
EASY to get on Hasbro Toy Shop.
While I get it that Aphra was released on a Vintage cardback a little bit afterwards, I find it hard to believe that this Luke 3-pack of resculpts will be in any more demand than the Aphra set was. I know it's Luke, and I know it's OT, but a new character is a new character and I'll take a new character any day over another rendition of Luke in his X-Wing Pilot gear - and if Hasbro is going to give that to me, then I want it on a numbered The Vintage Collection cardback - I don't want it in this three-pack format. I'm honestly surprised they packaged this set this way instead of like how they're doing those skiff guards. If the Lukes were individually carded The Vintage Collection figures in a single package like the Skiff Guards, then yeah, I agree with you 100%.
The set itself is strange anyway, why isn't it three versions of Luke from ANH? Like Tatooine, Stormtrooper & X-Wing Pilot or a version of Luke from each OT movie? Why is it two versions of Luke from ANH and one from ROTJ? Or did someone at Hasbro think that that X-Wing Pilot Luke was "close enough" for him in ESB?