This is how a Secret Lair works.
Secret Lairs are FOMO-fueled cards, where they print a limited amount and put them up for sale. They also will likely both release foil and non-foil versions.

If you truly need to buy these, since they're as massive as the Sonic the Hedgehog ones, look for a WPN store. They will likely get a tiny amount of stock.
The website will be slammed by people when it opens, and I don't want any of you to sit around for Ages and get nothing.

If a store is a WPN store, they will market it and run events.

Oh boy six Rathalos cards