The page doesn't disclose the price of the license for gambling. It says to contact them down at the bottom of the page. "Other Unity licenses available."
Ah, thanks. I didn't see that. It's crazy that they can charge that much though just because it's used in gambling. I mean, the software is the same, right?
For my industry (gambling) Unity costs $200K/title. Price gouging IMO but it's their business to charge what they like.