Well there is a few reasons for that.
A lot of people left early Thursday before it rained, since the forecast was showing rain all day Friday and Saturday (even though it ended earlier).
Not as many people are going anymore, big name vendors aren’t showing up because they are charging A LOT for vendors. Like Kuryakyn which is one the biggest vendors for chrome and LED’s for bikes. Also there is usually two tire vendors that do mount and balance while you wait that weren’t there. Avon and someone else I can’t think of. It will continue to die out year after year unless some changes are made. Even the vendors up at Warrensburg are dwindling down as I went up there also this year.