When the eye opens, click it to download your random deck. (Should take about 30 seconds for it to open.)
It will download as a .ydk file. Drag and drop it into your deck folder in YGOPro to use it.
Refresh the page to generate a new deck.
Made using the YGOHub API.
The deck generator is slightly smarter than just picking 40 random legal cards.
When the generator picks a card, it searches the text boxes of other cards for ones that mention a word in the title of this card.
Any of these cards it finds are added into a queue, which are inserted into random spots in the deck.
This makes the deck themed loosely around archetypes it finds. Very loosely.
If you open up a deck and it's less than 40 cards, that's probably because it's trying to use a card that hasn't been added to your ygo program yet.