Not a pissing contest and I NEVER said ASC had a design flaw so don't put words in my mouth to defend your girlfriend's honor.
I simply said that they don't work in every rifle and it wasn't just oddball lowers that were reported to have issues with ASCs (or CPD or Elander, etc). ALL the metal .308 mags aside from KAC and Larue are considered a crapshoot and have the reviews from actual buyers (and threads on gun forums) to that effect all over the web. And just because ASC is your favorite mag and works in your guns doesn't mean it works for everyone. You can say it's the lowers but PMags (that I don't personally like by the way) have very few reported issues with any brand of lower. While I might have missed it, I don't believe I have heard of any rifle that won't work with a Lancer.
And I might be a new AR10 owner but I am not new to the platform, as friends have had them for years and I watched their travails due to that lack of standards you mention.
In your haste to defend your favorite mag you totally ignored the actual point of my post though. Which was, "would you pay triple the price for an ASC (or other brand mag) just because someone like LuthAR put their rollmark on the base plate?".
I have no idea who is building the mags for LuthAR as they are refusing to divulge that info but their silence makes me seriously doubt they are doing the mags in-house. If they are building their own you would think they would be touting that to the heavens to drum up sales of their new product. Same thing if they were using a third party maker to build an improved mag that justifies that extra cost. In fact that silence makes me believe they simply don't want people to know they are paying a HUGE markup for a run of the mill mag.
When I asked, Fulton Armory freely admitted their mags are made by ASC and FA doesn't charge a premium just because they put their name on them.