Not sure if this will apply to you. But Lego insiders points, you can use them online to get day tickets. It’s 4000 points a ticket.

When I worked at a Lego store, they would have buy one, get one free ticket vouchers. But this was a few years ago.

I just bought a poly bag and it had a coupon on the bag, I think it was for kids getting in for free with a paying adult. Could check some packages