Sorry but this conference is a creditable action by these three who took over when the last remaining US VFP conference was about to end. They kept it going until now. There is no victim.

If people don't want to spend on the conference and prefer to wait for free material, your wishes will come true: the "hoarding" will end because the conference center won't hold the booking without commitment by July 2. If people do want to spend, then as you say, digital stuff is not used up just because somebody presents it at a conference in Arizona. Afterwards it's just as "free" for your use as it ever was. So what then needs to happen is for somebody (you?) to prevent the "genocide" by taking action. Otherwise it's just as the Elizabethan Nursery Rhyme says:

A man of words and not of deeds
Is like a garden full of weeds
And when the weeds begin to grow
It's like a garden full of snow
And when the snow begins to fall
It's like a bird upon the wall
And when the bird away does fly
It's like an eagle in the sky
And when the sky begins to roar
It's like a lion at the door
And when the door begins to crack
It's like a stick across your back
And when your back begins to smart
It's like a penknife in your heart
And when your heart begins to bleed
You're dead, and dead, and dead indeed.