In general I prefer to pick up the Paragon line by watching
"For Free on Internet"http://for-free-on-internet.com/
So you do not run into any activation questions after a crash and stuff like that. Paragon has a lot of products, and the specials seem to rotate here and there. Of course if you do not have a product at all, and it is on GAOTD, then you might pick it up awaiting for it to appear elsewhere.
Note that Paragon does a great job x-ref-ing your serial #s with your signon, which is linked to your email in your account that they maintain. So give one email you actually use, they are responsible not to send you too much, and you have a serial# backup. They make it very clear what serial# is for what product.
Oh, I am not sure .. maybe Paragon extends this courtesy to GAOTD (which would be unusual). If they do, and if the product key works fine after the first day, then their specials are as good thru GAOTD as through the computer mag specials.