The intention isn't to force them to use it in specific way but to give incentive to actually use the house.

We see a lot of people sitting on empty plots with literally nothing in it for months on end, unused in the case of player housing especially.
For FC houses, many of use has seen the wave of plots which are owned by 'one FC' just doing it to rinse the sub-system for money.

Having the limit would allow more than a few to hoard the market and give more chance for both more players to get at the system, or simply to introduce more diversity and activity to the wards.

I'm not pushing the idea they should do it my way, your way, any way specifically...
Just a push towards identifying Active plots & Fair share.