They also had one for Las Vegas night 1st 10,000 customers entering the park, in May 1998 and Laughlin night 1st 10,000 entering the park in Sept 1998.
They came on promo cards.

The Opening day chip was given to the 1st 15,000 customers entering the park, at the inaugral game in Bank One Ballpark, March 31, 1998. It also says Las Vegas on the back.
They are 50MM chips.
Inaugral chip was 1st sports chip made for a Major League Team.
I got all 3 from Will Hart-Designer at Paulson.

Paulson had a division that was pushing chips to sports teams, movie industry, etc back then.
I have one that says SF 49ers, 5 time Super Bowl winners, made in 1996.