It's part of their long-game of financially raping people.
1) Get people to invest their own money in property that is then donated to WTS.
2) Get people to pay "rent" on a property that they have already paid for, but stupidly donated to WTS.
3) Cram in lots of Congregations™ to the one property, to maximize the rent collected by WTS.
4) Get the people to make Contributions™ on top of the rent.
5) Decide, at a point of their own conjuring, to sell the property and disperse Congregations™ and Congregants™ to different locations, whether or not they like it.