Since Covid, for Regional Conventions in our area there has only been one larger venue at a small local sports arena where only had a couple congs were assigned from each of the several circuits in the region. All other congs attended numerous smaller conventions at the local Assm Hall, which seats less than 1600.
Prior to Covid, there were always multiple weekend events at that arena -- at least three, and only foreign language conventions were held at the Assm Hall.
WT is reaping the most they can by keeping the Assm Hall full every weekend and charging $$/publisher for those assigned to attend there.