It doesn't, I've said before, 10 years ago this would be a normal nda event, reviewers told details, given chips to test, reviews come a couple weeks later. Today we have twitter and people who can't keep their mouths shut as well as entitled enthusiasts who criticise AMD for not just stating information. So they made this tech thing public rather than private and let enthusiasts order early because why not, they want to those who don't want to... I know this will be hard to comprehend for you but, those who don't want to preorder... don't have to?
Considering AMD let a bunch of very highly specced Intel systems be tested against Zen on camera by probably a hundred + journalists/reviewers and many of them have shown various comparisons as well as AMD showing live benchmarking on stage, what do you think they are hiding?
So no, it doesn't beg a question of why they are trying to tie down sales, probably 50-100k people will pre-order, no one else will, Zen needs to sell in the region of 10's of millions to be successful, you think a tiny number of sales in the next week will make or break AMD... really? Or as you have been for years, are you just being anti-amd everywhere you can, like athlonxp1800?