Or you yourself can exercise a brain cell and see that what many players do only aims to compound the issue, quite significantly so, especially under the current constraint of FC : Private
It is hardly about ensuring everyone has access to a house and more about ensuring that measures are taken to prevent the misuse of the system and compounding the issue even further than it already is.
I'm sorry but if an individual or a group of individuals accounts for a portion of multiplot owners, especially in the case with a certain 2 FCs on this server accounting for 90 plots between the two. Regardless of how you want to try and dress this up or rationalize it; it is still a clear problem, much so that they have had to introduce countermeasures to prevent the issue from compounding even more.
Under their current system with instancing housing, there is always going to be a degree of hard-limitation on plot availability, so it isn't really just a matter of simply adding wards and calling it a day. As much as I wish this were the case, it isn't. So yes, I do firmly stand by the point that people should not have grandfathered plots, especially under the abysmal system. -- All they will continue to do is attempt to dissuade these would-be multi-plot owners by introducing systems that arguably become more of an inconvenience to actual players trying to obtain a plot. It's an abysmal feature that people are required to wait 30 days from their FC creation to even attempt getting a house, and this is a feature simply because people want to engage either in RMT of FC plots, and because they wish to hoard.
The problem is not necessarily related to just increasing the demand as that is without saying a small availability in the overall sum of things, but it shouldn't be a behaviour that is allowed to fester simply because of their lack of desire for stepping on players' toes for behaviour that arguably they dislike based on their trends with introducing systems.
To put it into perspective, whilst people see this as an acceptable thing to do they shall continue to attempt to find new ways to skirt these systems, be it through just more inconvenient measures of obtaining a house, or simply playing the long game with buying and waiting. The actual issue only comes with the fact that they deal with this behaviour by indirectly addressing it by introducing systems that are an inconvenience to players or a group of players.
Why should an FC be required to wait 30 days post-creation, or post-invitation to FC in order to stand a chance in purchasing a plot? I can certainly tell you this system was introduced precisely because of some of the methods people go about for buying multiple FC plots.