Just a WAG but this could be the answer?

I suspect it's the revision and renaming. I used to go through that way on the way back from Iowa Speedway. It was slow, or closed, most of the time. This is good news.

Bally’s Marquette is a newly rebranded and upgraded casino in Marquette, Iowa, located right along the Mississippi River.

The new casino will officially swing open its doors on Friday, (March 15th if I read the news right) completing a major shift for what was previously known as Casino Queen Marquette—a historic riverboat casino that had operated on the water for over 30 years.

The property has undergone several name changes throughout its history, starting as Miss Marquette in 1994, then becoming Isle of Capri Marquette, Lady Luck, and Casino Queen before the recent change.

This marks the end of the era for true riverboat casinos in Iowa. While some, like the Ameristar Casino Council Bluffs, are located on the water, they are docked and function as land-based venues rather than floating ones.

I'd expect that the other casinos will be making upgrades in the near future. Last I read the count was 20 casinos, but I'm not so sure that all of those had table games or chips. Marquette is very rural, not in a major population area, not on major highways, but there is a small advantage to being where it is and no Indian casinos close to the location.