Speaking purely in terms of qualifying the first time, and not a re-qualify.

Yes I know the cost of the tickets, I've seen the receipts/itineraries (SIN-SFO runs around $8k-9K for C, they do get some discount for corporation and can get them around $6k a ticket, they buy them usually 1-2 weeks out)... and yes it is a misnomer to call these "full" fare, but the point being, they're not discounted Z-class fares... which is what the original poster mentioned as their class of transport and opportunity in qualifying for the first time as a GS member. There are also that Y/B fares help qualify for GS, and I'm only saying as what the issued ticket says the fare class is, not playing semantics on what we call full fare etc.. just saying Z fares and discounted economy, regardless of revenue spent, usually doesn't help your chances to first time qualify for GS....

There is ample proof in this, see the 350k miles all flown in mainly in discounted Y/biz and never received GS invitation, and then see the responses they posted from MP when requesting GS and then try and disagree that GS isn't a premium fare reward.

So the point of my response was to point out what it takes to qualify initially for GS based on the vague and random information out there, and it clearly is suggestive that in order to qualify you need to be buying high priced fares as often as possible, and the $ amt matters not the miles, and that cut off seems to me $40k USD.... this is not a fact but rather gathered information from these forums here, along with friends who fly often, confirming vaguely this threshold.